-15.43% is the change from 188 to 159
Calculation steps:
[( 159 - 188 ) ÷ 188] x 100 = -15.43%
Formula
Percentage change = [(159 - 188) / 188] x 100
Subtract the new number by the original number
159 - 188 = -29
-29 ÷ 188 = -0.15425531914893617
-0.15425531914893617 x 100 = -15.43%