Which statements calculate the percentage change using the earlier value as the base? Select all that apply.
From 40 to 50 is a 10% increase.
From 40 to 50 is a 25% increase.✓Correct answer
From 50 to 40 is a 25% decrease.
From 50 to 40 is a 20% decrease.✓Correct answer
Explanation
From 40 to 50, the change is 10 and 10 / 40 x 100 = 25%. In reverse, the base is 50, so 10 / 50 x 100 = 20%; assuming the two directions have the same percent ignores the changed base.