Question

what number should be added to_5/8so as to get 5/9

Answer 1

let the value add x
x+5/8=5/9
x=5/9-5/8
x=40-45/72
x= -5/722
is answer

Answer 2

Suppose that number is x

now..

x+ 5/8 =5/9

x= 5/9-5/8

x= 5(8-9)/(9*8)

x= -5/72