This math is tough, help?

Question

1.) what percent of 35 is 7?

2. 18 is 30% of what number?

Answer 1

The hardest part of these questions is turning them into equations to solve.

Here are my tips:
"What percent" --> n/100
"of" --> *
"35" --> 35
"is" --> =
"7" --> 7

Put this together and you have:
(n / 100) * 35 = 7

Divide both sides by 35:
n / 100 = 7 / 35
n / 100 = 1/5

Multiply both sides by 100:
n = 1/5 * 100
n = 100/5
n = 20

So the answer is 7 is 20% of 35

PROBLEM 2:

"18" --> 18
"is" --> =
"30%" --> 30/100
"of" --> *
"what number" --> n

18 = 30/100 * n

Multiply both sides by 100/30:
100/30 * 18 = n
1800 / 30 = n
180 / 3 = n
60 = n

So 18 is 30% of 60

Answer 2

Question 1:
7/35*100 = 20%

Question 2:
18*100/30 = 60

Answer 3

I learned the "rule of 3" as a child and to this day is the only thing I use.
35 is 100%
7 is X
Multiply the 2 known corners (7 x 100) and
divide it for the one with the X (35)
7 x 100 = 700 divided by 35 = 20

Answer 4

1) 7 / 35 x 100 = 20%

2) 18 x 30 / 100 =50.4

Answer 5

1. To find a percent, simply divde the number you are trying to find a percent of by the number you are fitting it into.

So in your case, you simply need to divide 35 by 7.

7/35 = ?

2. To find 30% of a number, you multiply it by .3. So your equation set up looks something like .3x=18.

So if you get x alone in the equation by dividing 18 by .3, you'll get your answer.

18/.3 = ?

Answer 6

35 - 100%
7 - x

x= 7 * 100 / 35
x= 700 / 35
x = 20%


x - 100%
18 - 30%

x = 18 * 100 / 30
x = 1800 / 30
x = 60

Answer 7

7/35 = .2
.2 * 100 = 20%

30% / 100 = .3
18 / x = .3
18 = .3x
x = 60

Answer 8

1.) 20%

35x=7
x=(7/35)
x=.2

2.) 60

18=.3x
(18/.3)=x
60=x