Question

Since 1980 the average height of 20-year-old females has increased by 2.3 cm, to 170.6 cm. What was the average height of a 20-year-old female in 1980?

Answer 1

168.3 cm

Explanation:

It was 2.3 cm less than 170.6 cm, so we use subtraction.

170.6 cm - 2.3 cm = 168.3 cm