Question

Alan is putting weed killer on a field to get it ready for planting. The directions on the container say to use 4/5 of a quart for each acre of land. How much weed killer will Alan need for two fields, one that is 22 1/2 acres and one that is 38 1/4 acres?

Answer 1

28 1/8 weed killer

47.8125 weed killer

Explanation:

22 1/2 divided by 4/5

38 1/4 divided by 4/5

he will have to buy 48 3/5 quarts

Answer 2

Add the 2 fields together to get the total acres:

22 1/2 + 38 1/4 = 60 3/4 acres.

Multiply The number of acres by 4/5 to get total quarts:

First change 60 3/4 into an improper fraction:

60 3/4 = 243/4

Now you have 243/4 x 4/5

Multiply straight across to get: ( 243 * 4) / (4 * 5) = 972/20

Now convert 972/20 to a proper fraction:

48 12/20 = 48 3/5 quarts total, so he will need to buy 49 quarts