Question

Find the percent increase or decrease from 60 to 600.

Answer 1

percent change is (new amount - old amount) / old amount.

So, here, your new amount is 600 and your old amount was 60.

Answer 2

So that would be: (600 - 60)/60

Make sure you convert that decimal to a percentage...

Answer 3

900%?

Answer 4

A)


850%


B)


900%


C)


100%


D)


950%

Answer 5

those are m answer choices

Answer 6

yes :) I didn't mean to confuse it by saying "convert the decimal"... didn't think about the fact that it would be an even 9.

900% is correct

Answer 7

coud you help me on this one too? x.x

Answer 8

Find the percent increase or decrease from 65 to 120.

Answer 9

It's the same idea:
(new - old) / old = (120 - 65)/65

Answer 10

0.846

Answer 11

Is the answer to that but do i round it?

Answer 12

87.5%
65%
84.30%
84.62%
are my answer choices

Answer 13

you need to have it as a percentage... 0.84615 = 84.615 %

But yes, then you round it appropriately based on your answers.

Answer 14

So, 84.62%

Answer 15

yes... correct :)

Answer 16

Thanks! Could you help me with a few more? :)

Answer 17

Sure, glad to help...

Answer 18

thanks!

Answer 19

The cost of sugar rises from $20 per kg to $25 per kg. What is the percentage increase for the cost of sugar?
25%
50%
30%
20%

Answer 20

can you set it up this time?

Percent increase = (new - old)/old =

Answer 21

(20-25)/20 ??

Answer 22

like that?

Answer 23

Close... you probably want to subtract 20 from 25... like 25 - 20 rather than 20-25

Answer 24

(current price - previous price) / previous price = (25 - 20) / 20

Answer 25

25%?

Answer 26

correct :)

Answer 27

if you had done 20-25 / 20, you would have gotten -25%... you could just realize that you subtracted in the wrong direction... that an increase from 20 to 25 should be a positive percentage.

Answer 28

Oh,

Answer 29

The biggest cause of error on these is accidentally dividing by the new amount instead of the old amount. you find percentage change by the amount of change divided by the old amount.

Answer 30

but you didn't make that error :)

Answer 31

x) yay

Answer 32

The cost of a car is $35,000. If the cost is increased by $7000, what is the percent increase?
20%
25%
50%
2%

Answer 33

yay... small victories are nice :)

Answer 34

go for it... I'll check your work.

Answer 35

this one's slightly different, but it's the same idea... how much did it change, and then divide the change amount by the original amount.

Answer 36

(35000-7000)/7000

Answer 37

no, that's why this one is a little different.

the price is 35000

They don't tell you the new price... they just say it went up by 7000.

So you could add and find new price as 35000 + 7000 = 42000

Then (new - old) / old = (42000 - 35000) / 7000

But you can also just realize that the stuff in the numerator is the "amount of change"... and here, they just told you that the amount of change is 7000.

So you can find percentage change by (amount of change) / (original amount)

7000/35000

Answer 38

5000

Answer 39

Oh wait
0.2 or 2%

Answer 40

sorry, I made a typo in the middle up there... it should have been

Then (new - old) / old = (42000 - 35000) / 35000

oops!

Answer 41

7000/35000 = 1/5 = 20%

That's right, glad you caught it :)

Answer 42

The cost of a dress is $ 150. If its cost is increased by 10%, what is the new cost?
(I'm timed and didn't realize it. I have 20 minutes left) D:

Answer 43

Same idea: multiply 150 * 10%... that's the increase amount. Then add to $150 to get the new cost.

Answer 44

2400?

Answer 45

choices:


A)


$ 155


B)


$ 165


C)


$ 166


D)


$ 160

Answer 46

150 * 10% = 150 * 0.10 = $15 increase
Old cost: $150
New cost: $150 + increase = $150 + $15

Answer 47

Got it! And 3 more questions okay?

Answer 48

Tom's commute was 90 miles, but it increased by 40% when he changed jobs. What is the distance of his new commute?

Answer 49

Same exact thing:
Increase amount = 40% * 90 miles = 36 miles
New commute = 90 + 36

Answer 50

126 miles

Answer 51

(10 mins left@ :( ) The cost of a dress is $120. If its cost is increased by 5%, what is the new cost?

Answer 52

Same again:
increase amount = 120 * 0.05 = 6
Old amount: 120
New amount 120 + 6

You can get these I think... :) Too bad they rush you.

Answer 53

Ikr. I hate being rushed. -.- I can't learn properly. :(

Answer 54

The cost of a wallet is $120. If it's cost decreases by 15%, then calculate the new cost.

Answer 55

cost decrease: 15% * 120 = 18
Old cost: 120
New cost: 120 - 18

Answer 56

5 mins. x.x

What speed is a car traveling if there is a 25% decrease in the speed of a car whose original speed was 80 miles/hr?

Answer 57

decrease: 80 * .25 = 20
old: 80
new: 80 - 20

Answer 58

Find the percent increase or decrease from 25 to 100.

Answer 59

last one!

Answer 60

I know its not 75% because theres no answer choice for that. XD I just can't get this last one. x.x

Answer 61

should be 400% increase, right?

Answer 62

i think. not sure. x.x the answer choices are
A)


350%


B)


625


C)


300%


D)


325%

Answer 63

4 times as much?

Answer 64

no, 100-25/25 = 75 / 25 = 300%

Answer 65

sorry, this pace is a recipe for error :(

Answer 66

tanks

Answer 67

done?