Values of a B and C represent the answer in the simplest form 7/9 divided by 4/9 equals ABC

Cora bought a package of erasers. there are 4 pink erasers and 12 blue erasers. what is the ratio of pink erasers to blue erasers?

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?