Writing find a ratio equivalent to 12/21 with lower terms and with greater terms?

Find the maximum value of p= 4x + 5y subject to the following constraints :

What is the volume of a rectangular crate that has dimensions 9 inches by 9 inches by 1 feet? 1,458 in.3 121.5 in.3 1,012.5 in.3 36 in.3

If you eat 4 medium strawberries, you get 48% of your daily recommenced amount of vitamin c. what fraction of your daily amount of vitamin c do you still need?