-15.87% is the change from 189 to 159
Calculation steps:
[( 159 - 189 ) ÷ 189] x 100 = -15.87%
Formula
Percentage change = [(159 - 189) / 189] x 100
Subtract the new number by the original number
159 - 189 = -30
-30 ÷ 189 = -0.15873015873015872
-0.15873015873015872 x 100 = -15.87%