Question

help math

Answer 1

Hey!

So our first number is 80 and we're increasing it by 50%

Answer 2

So since we're increasing that means our new number has to be bigger

There's two ways to do it-
We first multiply 50% or 0.5 to 80
and then whatever we get, we add that to 80

Answer 3

So

80 x 0.5 = ?

Answer 4

Another way to do it

since we know that we're increasing the number, we can multiply it by 100% + 50%

so if we multiply it by 150%, we save a few steps

so 150% is the same as 1.5
what is 80 * 1.5 =

Answer 5

Wait I thought it was jus 100% altogether

Answer 6

120

Answer 7

Srry I’m asking a lot of questions your smart so I’m tryna learn lol

Answer 8

when you increase, that means the number has to be bigger

as an example-

I have this cookie and I'm selling it for $2
But now I'm increasing the price by 50%

if I just do 50% or 0.5 * 2, I'll get 1
Does that mean I'm selling my $2 cookie for $1 now?

Absolutely not!!
I'm adding that 1 on top of the 2 dollars which makes it $3

Answer 9

So another way which saves steps so you don't have to do the multiplication and then add to the number is to account for all of that in the beginning

so
we're INCREASING by 50%

that means 2 dollars was our original amount
basically the full 100% price

now we're increasing it by 50%

so altogether it's 150%
and so 150% or 1.5 * 2 gives us 3 which is the final price

Answer 10

I got 120

Answer 11

\(\color{#0cbb34}{\text{Originally Posted by}}\) @lilcutie2
120
\(\color{#0cbb34}{\text{End of Quote}}\)

Now that's correct!

But your question isn't done yet. They now want us to decrease it by 50%

Answer 12

50% is the same thing as 50/100 or 0.5

so what is

120 * 0.5 =

Answer 13

60%

Answer 14

we don't add any percent signs here, it's just going to be 60 :)

Answer 15

or just 60

Answer 16

there you go!

Answer 17

Nice

Answer 18

Does that make sense?

Did my example help :)

Answer 19

The second one you do the exact same steps

Answer 20

So for this question similarly-

we're DECREASING by 25%

that means
from our total 100%, we're taking away 25%

so we have to multiply the number by 75% or 0.75

Answer 21

Does that make sense?

Answer 22

yes

Answer 23

So what is 128 * 0.75

Answer 24

96

Answer 25

Good

Answer 26

Now we're INCREASING it by 25%

so what should we multiply it by?

we have the whole 100% of the number and we're increasing it by 25%

what are we going to multiply it by?

Answer 27

0.25

Answer 28

we can do that too

but if we multiply by 0.25, remember to add it back to the original 96
because we're INCREASING by 25%

so what is 96 * 0.25 =

Answer 29

24

Answer 30

Correct

Answer 31

now add that to 96

so 96 + 24 =

Answer 32

120

Answer 33

See you got this

Answer 34

And that's your answer!

Answer 35

\(\color{#0cbb34}{\text{Originally Posted by}}\) @CripQUEZZ
See you got this
\(\color{#0cbb34}{\text{End of Quote}}\)
thxs

Answer 36

\(\color{#0cbb34}{\text{Originally Posted by}}\) @AZ
And that's your answer!
\(\color{#0cbb34}{\text{End of Quote}}\)
thxs for the help

Answer 37

You're absolutely welcome!

Answer 38

\(\color{#0cbb34}{\text{Originally Posted by}}\) @lilcutie2
\(\color{#0cbb34}{\text{Originally Posted by}}\) @CripQUEZZ
See you got this
\(\color{#0cbb34}{\text{End of Quote}}\)
thxs
\(\color{#0cbb34}{\text{End of Quote}}\)
Np

Answer 39

so can I show you how I do this next one to see if I got it right

Answer 40

For sure!! Let's see you take a stab at it

Answer 41

I'm gonna do this one

Answer 42

150 times .40 equals 60 and then 60 times .60 is 36

Answer 43

eeee and then add the principle value

Answer 44

sorry no

remember what we said about increasing and decreasing?

Answer 45

60 plus 36 =96

Answer 46

so 96

Answer 47

actually no mhmm

Answer 48

sorry I'm trying

Answer 49

So we have to do each part on it's own

we're INCREASING by 40%

Answer 50

you found (correctly) that 150 * 0.4 is 60

now since we're INCREASING
you have to add that 60 to 150

so what is 150 + 60

Answer 51

150 plus 60= 210

Answer 52

good! So that's the answer to the first half of your question

Now for the second half

we're taking 210 and INCREASING it by 60%

so how do we do that?

Answer 53

times 210 by .60

Answer 54

okay good

and then we have to add that to 210 because we're INCREASING by 60%

Answer 55

336

Answer 56

And there you go! That's your answer to the second part

Answer 57

Good job

Answer 58

so do we do the same for decrease

Answer 59

for decrease, we would just subtract whatever you get from the original number

Answer 60

ok thanks

Answer 61

You're welcome!

Answer 62

@AZ

Answer 63

got a question I did this one but I want to make sure it's right

Answer 64

i can help

Answer 65

I did it I just want to make sure I did it right

Answer 66

what'd you get

Answer 67

so I did 480*.35= 168 and then 480-168=312 and then 312*.65=202.8 and then 480-202=278

Answer 68

ummm, since 0.35 and 0.65 add up together to be 1,
you could just do 480 * 0.35, and 480 * 0.65
so, the first parg ig is right, but the 'and then 312*0.65', that's not needed,
for the other part, just do 480 * 0.65

Answer 69

no, she's rightabout 312 * 0.65

but remember, you have to subtract that from 312 not 480
so what is 312 - 202.8 =

Answer 70

\(\color{#0cbb34}{\text{Originally Posted by}}\) @AZ
no, she's write about 312 * 0.65

but remember, you have to subtract that from 312 not 480
so what is 312 - 202.8 =
\(\color{#0cbb34}{\text{End of Quote}}\)
she is right about the first part
but not the second

Answer 71

and wait, how'd you edit your answer... i can't do that?

Answer 72

err you quoted my first reply where I accidentally wrote write instead of right

Answer 73

lol, ik

Answer 74

I copy pasted and quickly re-posted

Answer 75

oh

Answer 76

109.2

Answer 77

well, you're still missing a space lol

Answer 78

where

Answer 79

\(\color{#0cbb34}{\text{Originally Posted by}}\) @lilcutie2
109.2
\(\color{#0cbb34}{\text{End of Quote}}\)

And well done!

Answer 80

\(\color{#0cbb34}{\text{Originally Posted by}}\) @AZ
\(\color{#0cbb34}{\text{Originally Posted by}}\) @lilcutie2
109.2
\(\color{#0cbb34}{\text{End of Quote}}\)

And well done!
\(\color{#0cbb34}{\text{End of Quote}}\)
thanks

Answer 81

@az

Answer 82

so I did 350*.76 an then did 350+266 and got 616 is that right

Answer 83

ye

Answer 84

and then do 616*.45 =277.2 and then 616-277.2=338.8

Answer 85

Also I would suggest making a new post :)
It takes a while to keep scrolling to the bottom haha

Answer 86

lol

Answer 87

\(\color{#0cbb34}{\text{Originally Posted by}}\) @AZ
Also I would suggest making a new post :)
It takes a while to keep scrolling to the bottom haha
\(\color{#0cbb34}{\text{End of Quote}}\)
ok but am I right

Answer 88

You are!