Question

What is 70% of blank = 28

Answer 1

Percent means parts out of 100
70%=70/100=7/10
7/10 of x=28
'of' means multiply
7/10 x=28
multiply both sides by 10/7 to get rid of fraciton
x=40


the number is 40

Answer 2

Divide 28 by .7 and you have your answer...40.. simple algebra just get x(blank) by itself