-36.64% is the change from 131 to 83
Calculation steps:
[( 83 - 131 ) ÷ 131] x 100 = -36.64%
Formula
Percentage change = [(83 - 131) / 131] x 100
Subtract the new number by the original number
83 - 131 = -48
-48 ÷ 131 = -0.366412213740458
-0.366412213740458 x 100 = -36.64%