Question

Mrs. Larson mowed

1
4
of her lawn. Her son mowed
2
7
of it. Who mowed most of the lawn? How much of the lawn still needs to be mowed?

Answer 1

Mrs. Larson's son mowed most of the lawn. 5/7 of the lawn still needs to be mowed.

Step-by-step explanation:

To determine who mowed most of the lawn, we need to find the sum of the fractions Mrs. Larson and her son mowed. Mrs. Larson mowed 1/4 of the lawn and her son mowed 2/7 of it. To find the total fraction mowed, we need a common denominator which is 28. So Mrs. Larson mowed 7/28 of the lawn and her son mowed 8/28 of it. Here, we can see that her son mowed most of the lawn, as 8/28 is greater than 7/28.

To find out how much of the lawn still needs to be mowed, we subtract the fraction already mowed from 1. In this case, 1 - 8/28 = 20/28 is still left to be mowed. This fraction can be simplified to 5/7 of the lawn.