-74.37% is the change from 316 to 81
Calculation steps:
[( 81 - 316 ) ÷ 316] x 100 = -74.37%
Formula
Percentage change = [(81 - 316) / 316] x 100
Subtract the new number by the original number
81 - 316 = -235
-235 ÷ 316 = -0.7436708860759493
-0.7436708860759493 x 100 = -74.37%