Question

pls answer question 1 with steps to make me understand
pls answer fast

Answer 1

let the required number be x
next subtract 1/2 from it that is x-1/2
now multiply it with 1/2 so we will get (x-1/2)1/2
given that 1/2(x-1/2)=1/8
so x-1/2=2/8
x-1/2=1/4
x-2/4=1/4
x=1/4+2/4
so x=3/4