Since 5 hummingbirds drink 7.5 ounces, we have to figure out how many ounces goes to only one.
You should divide 7.5 by 5, and that equals 1.5
Then you're going to multiply 1.5 by 14 because there are 14 hummingbirds
1.5 * 14 = 21
21 ounces of sugar water is needed for 14 hummingbirds.