Question

can someone tell the the steps to writing and solving an equation to find the part of a whole number 18% of 90 is what number

Answer 1

18% of 90 means the same as:
\[\frac{18}{100} \times \frac{90}{1}\]

Answer 2

so for 5% of 522 i wrote it the same way over 1

Answer 3

so the answer for the first on is 1620????

Answer 4

Close, you forgot to divide by 100!

Answer 5

so once i get the first number ... then i div by 100

Answer 6

so its 620

Answer 7

Yes, \[\frac{18}{100} \times \frac{90}{1}=\frac{18 \times 90}{100 \times 1}=\frac{1620}{100}\]

Answer 8

It is not 620.

Answer 9

huh

Answer 10

16.2

Answer 11

16.2 is correct.

Answer 12

41 of 800 is 328 right

Answer 13

It is indeed correct, well done!

Answer 14

question why is it always over 100

Answer 15

how do you write and solvean equation to find the whole 96% of what number is 24?

Answer 16

The % sign means divide by 100. "per cent" literally means "per hundred".
\[\frac{96}{100} \times x = 24\]You should be able to solve for x with algebra from there.

Answer 17

so 24 would b 2400???

Answer 18

I think I see what you're getting at. Do you mean \[96 \times x = 2400\]?

Answer 19

yes

Answer 20

Then that is correct so far. What's the next step?

Answer 21

x 2400 by 96

Answer 22

You're close, but not quite right. If you have 96x, what do you have to do get 1x?

Answer 23

96 over 1?

Answer 24

96 over 1 equals 96. "over" is the right way to think though.

Answer 25

so 96x 2400

Answer 26

I'm afraid not.

Answer 27

huh

Answer 28

What you did there was multiply by 2400.\[96 \times x = 2400\] is an equation, so whatever you do to one side, you have to do to the other side as well. If you multiply 2400 by 96, you also have to multiply 96x by 96 as well, getting you \[96 \times 96 \times x = 2400 \times 96\] which doesn't help at all!

Answer 29

im lost

Answer 30

You're starting with \[96 \times x = 2400\]and you want to end up with \[x=?\]To do that, you have perform some operation on both sides of the equation. To figure out what that operation is, you have to look at \[96 \times x\]and\[x\]What's different about those two numbers?

Answer 31

so do you cancal out out the x and just make it 96 because u cant multi letter so u make the letter a number

Answer 32

If you cancel out the x on one side, you have to do it on the other side as well. "cancelling out" in this case means dividing by x, so you go from \[96 \times x = 2400\] to \[96 = \frac{2400}{x}\] You're getting closer to the right answer, but you're not there yet!

Answer 33

i think i did it wrong on my paper b/c i div 2400 by 0.96

Answer 34

That would also be incorrect, yep :)

Answer 35

shoot

Answer 36

What's the difference between \(96x\) and \(x\)?

Answer 37

96 is just plain 96

Answer 38

and x is x

Answer 39

25

Answer 40

That's \(96x\), not 96 :)

Answer 41

2400/96

Answer 42

Correct.

Answer 43

x=25

Answer 44

40% of 30 = 0.0133333333333333

Answer 45

Incorrect I'm afraid. Could you post your workings?

Answer 46

shoooooooot

Answer 47

40/ 3000

Answer 48

40/30 = 1.33333333

Answer 49

\[\frac{40}{100}\times \frac{30}{1}=\frac{40 \times 30}{100 \times 1}\]

Answer 50

1200 over 100

Answer 51

= 12

Answer 52

Yeps

Answer 53

then why when you find the part it says 39% of 377 is 147.03 0.39x 377

Answer 54

\[39\%=\frac{39}{100}=0.39\]They are all the same number, written differently.

Answer 55

what is the difference btw finding the part of a whole and just findind the whole

Answer 56

I'm only guessing here, but a part of a whole sounds like some fraction / percentage of a number.

Answer 57

thanx

Answer 58

If you need more info on this, watch Khan's video
http://www.khanacademy.org/video/describing-the-meaning-of-percent?playlist=Developmental+Math

He has a few on percent that are pretty good.

Answer 59

wow thanx