Question

if 4 is added to both numerator and denominator of 5/8, by how much is the fraction changed?

Answer 1

(5 + 4) / ( 8 + 4) = 9/12 = 3/4

3/4 - 5/8 = 6/8 - 5/8 = 1/8  <== this much the fraction has changed.