what is 6 3/4 divided by 2 5/8 ?
6 + 3/4 = 27/4
2 + 5/8 = 21/8
So we have
27/4 ÷ 21/8 change to multiplication and invert the second fraction
27/4 x 8/21 =
8/4 x 27/21 =
2 x 9/7 =
18 /7