For 2/3 there are equvialent fractions such as 4/6,6/9,8/12
for 3/4 there is 6/8,9/12,12/16
for 4/5 there is 8/10,12/15,16/20
These can all be figured out by multiplying the numerator and the denomanator by the same number! Each of these fractions can be reduced back to there original fraction! Hope this helps