A recipe for fruit punch says to use 8 ounces of orange juice for every 3 ounces of grape juice. Nicky used 72 ounces of orange juice. How many fewer ounces of grape juice were used?

For every 3 sit-ups Peter does, Greg does 4. Peter did 24 sit-ups. How many sit-ups did Greg do?

Students at Memorial School voted for their favorite snack. For every 5 students that voted for candy, 2 students voted for popcorn. There were a total of 45 votes for candy. How many fewer students voted for popcorn than candy?

Andy cuts a piece of string into two pieces that are in a ratio of 5:3. The shorter piece is 36 cm. What was the length of the original piece of string?

Steven and Megan shared some marbles in the ratio 3:4. Megan received 24 marbles. How many marbles did Steven get?