-24.24% is the change from 66 to 50
Calculation steps:
[( 50 - 66 ) ÷ 66] x 100 = -24.24%
Formula
Percentage change = [(50 - 66) / 66] x 100
Subtract the new number by the original number
50 - 66 = -16
-16 ÷ 66 = -0.24242424242424243
-0.24242424242424243 x 100 = -24.24%