7/15÷3/4+8/15÷3/4(7/15+8/15)*4/3=4/3
(2/7+5/7)*4/7*3/2=4/7*3/2=6/7
3/4*5/2+0.75*37.5%=3/4(5/2+75/200)=3/4(20/8+3/8)=3/4*23/8=69/32
7/15÷3/4+8/15÷3/4(7/15+8/15)*4/3=4/3
(2/7+5/7)*4/7*3/2=4/7*3/2=6/7
3/4*5/2+0.75*37.5%=3/4(5/2+75/200)=3/4(20/8+3/8)=3/4*23/8=69/32