are the ratios 84/96 and 56/63 proportional?
no, because one ratio reduces to 7/8, and the other reduces to 7/9
yes, because they both reduced to the equivalent fraction 7/8
no, because one has a quotient of 0.875 and the other has a quotient of 0.8.
yes, because the cross products 84•63 and 96•56 are equal.