Question

I know the 90 percent number so how do i find the 100 perent number

Answer 1

Divide th 90% number by 9. Then multiply that quotient by 10 to get the 100% number

Answer 2

divide the known number by 0.9

for example if you know 9 is 90% of a number

 divide 9 by 0.9 which = 10

9 is 90% of 10