-18.13% is the change from 160 to 131
Calculation steps:
[( 131 - 160 ) ÷ 160] x 100 = -18.13%
Formula
Percentage change = [(131 - 160) / 160] x 100
Subtract the new number by the original number
131 - 160 = -29
-29 ÷ 160 = -0.18125
-0.18125 x 100 = -18.13%