Hank used 4 1/4 bags of seed to plant grass in his front yard. He used 5 times as much seed to plant grass in his back yard. How much seed did Hank need for the backyard?

Answer: 21 1/4 bags

Step-by-step explanation: If Hank used 4 1/4 bags of seed to plant the grass in his front yard and then used 5 times as much to plant the back yard he used a total of 21 1/4 bags.

This is calculated by multiplying 4 1/4 x 5 = 20 5/4, which equals 21 1/4.

4 1/4 = 17/4

17/4 • 5 = (17•5) / 4

17•5 = 85

85/4 = 21 1/4