Percents

For this, we must solve...

20/100=30/x

Cross multiply by multiplying each numerator by the other fraction's denominator and you get...

20x=3000

Sivide by 20 on each side...

x=150

Well to get that you do 30/.20=150

Let the number be=n

20%n=30

.20n=30 divide both sides by .20

n=30/.20

n=150