Answer :
50/75 reduces to 2/3
10/15 reduces to 2/3
2/3 is 2/3
6/9 = 2/3
5/7 will not reduce
so ur answer is 5/7
10/15 reduces to 2/3
2/3 is 2/3
6/9 = 2/3
5/7 will not reduce
so ur answer is 5/7