Question

How many one fourths need to be added to two one fourths to make 5

Answer 1

Your question is slightly confusing.  So either:

Add 18 one fourths to 2 one fourths to make 5

Or add 11 one fourths to 2 and one fourth to make 5

Answer 2

18 more 1/4 ths have to be added to two 1/4ths to make it a 5 .

hope it helps.