Question

A roll of wallpaper is 21 inches wide and 213 inches long. Four-fifths of the roll is used to cover a wall. What length of wallpaper is left? (answer as a fraction pls)

Answer 1

42.6 ft

Explanation:

1 - 4/5 = 5/5 - 4/5 = 1/5

Since 4/5 of the roll was used, 1/5 of the roll is left.

1/5 * 213 ft = 213/5 ft = 42.6 ft