-20.9% is the change from 201 to 159
Calculation steps:
[( 159 - 201 ) ÷ 201] x 100 = -20.9%
Formula
Percentage change = [(159 - 201) / 201] x 100
Subtract the new number by the original number
159 - 201 = -42
-42 ÷ 201 = -0.208955223880597
-0.208955223880597 x 100 = -20.9%