-68% is the change from 50 to 16
Calculation steps:
[( 16 - 50 ) ÷ 50] x 100 = -68%
Formula
Percentage change = [(16 - 50) / 50] x 100
Subtract the new number by the original number
16 - 50 = -34
-34 ÷ 50 = -0.68
-0.68 x 100 = -68%
Example