Question

Four friends went to a trip. One of them paid 2/7 of Bill, and rest of the bill was shared equally by remaining friends. What fraction of the bill was paid by each?

Answer 1

2/7 + a +a +a = 1
3a = 5/7
a = 5/21 paid each person

Answer 2

2/7 +x × x +X = 1
3x=5/7
X=5/21