Question

If you subtract 1/2 from a number and multiply the result by 1/2, you get 1/8. What is the number?

Answer 1

0.75 or 3/4 cus
1/8=0.125
1/2=0.5
so as per as the question 0.125/0.5=0.25
then 0.25+0.5=0.75 

hope this helps

Answer 2

let the number be =x
therefore, (x-1/2)×1/2=1/8
2x-1/2×1/2=1/8
2x-1/4=1/8
2x-1=1/8×1/4
2x-1=1/2
2(2x-1)=1
4x-2=1
4x=1+2
4x=3
x=3/4