(9/14+5/14)-(4/21+11/28)

Question

(9/14+5/14)-(4/21+11/28)

Comments

=5/12

Answer 1

1) 9/14 + 5/14 = 14/14 = 1
2) 4/21 + 11/28 = (16+33)/84=49/84=7/12
3) 1 - 7/12 = 5/12