Question

Question

Explain why a change from 20 to 40 is a 100% increase, but a change from 40 to 20 is a 50% decrease.

Increasing 20 to 40 is the same as increasing 20 by
___ . So, it is a 100% increase. Decreasing 40 to 20 is the same as decreasing 40 by one-half of ___ . So, it is a 50% decrease.

FILL IN THE BLANKS.

Answer 1

Change from 20 to 40 is 100%
Increase because it doubles the number eight changed to 4220 is 50% decrease is because it half of what it is

Answer 2

A change from 20 to 40 is a 100% increase because it doubles the number. A change from 40 to 20 is a 50% decrease because it halved the number.

Explanation: