2/3+2/7=. 5/10-7/15=.9/10-1/12=.5/7+1/28=

Question

2/3+2/7=. 5/10-7/15=.9/10-1/12=.5/7+1/28=

Answer 1

1.2/3+2/7=10/21

2.5/10-7/15=1/30

3.9/10-1/12=49/60

4.5/7+1/28=3/4