Johnny rode his bike 4 sevenths of a mile from his house to the lake on a straight path. Then, he turned around and rode his bike 3 and 1 eighth miles in the opposite direction. About how far is Johnny from his house?

Because Johnny turned around, his distance from home is the difference between the two rides: 3 1/8 − 4/7 = 143/56 = 2 31/56 miles. That is about 2.55 miles, which is closest to 2 1/2 miles, choice C.

AI-written and checked against the verified answer.