What is three fourths minus five eighths?
First you need a common denominator:
3/4 and 5/8, the common denominator is 8. (4x2=8, 8x1=8)
Multiply both the numerator and denominator of 3/4 by 2 so that
it becomes 6/8.
Now that a common denominator is established, you may subtract
them with ease.
6/8 - 5/8 = 1/8.