-20.12% is the change from 164 to 131
Calculation steps:
[( 131 - 164 ) ÷ 164] x 100 = -20.12%
Formula
Percentage change = [(131 - 164) / 164] x 100
Subtract the new number by the original number
131 - 164 = -33
-33 ÷ 164 = -0.20121951219512196
-0.20121951219512196 x 100 = -20.12%