Larry will need 50 feet of ribbon to make 20 bows.
To calculate the amount of ribbon Larry will need, we need to multiply the length of ribbon needed for each bow by the number of bows.
Larry needs 2 1/2 feet of ribbon for each bow, so we can convert this mixed number to a fraction: 2 1/2 = 5/2.
Next, we multiply the length of ribbon needed for each bow by the number of bows: 5/2 x 20 = 100/2 = 50 feet. Therefore, Larry will need 50 feet of ribbon to make 20 bows.
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