-63.64% is the change from 66 to 24
Calculation steps:
[( 24 - 66 ) ÷ 66] x 100 = -63.64%
Formula
Percentage change = [(24 - 66) / 66] x 100
Subtract the new number by the original number
24 - 66 = -42
-42 ÷ 66 = -0.6363636363636364
-0.6363636363636364 x 100 = -63.64%