-17.61% is the change from 159 to 131
Calculation steps:
[( 131 - 159 ) ÷ 159] x 100 = -17.61%
Formula
Percentage change = [(131 - 159) / 159] x 100
Subtract the new number by the original number
131 - 159 = -28
-28 ÷ 159 = -0.1761006289308176
-0.1761006289308176 x 100 = -17.61%