-82.95% is the change from 475 to 81
Calculation steps:
[( 81 - 475 ) ÷ 475] x 100 = -82.95%
Formula
Percentage change = [(81 - 475) / 475] x 100
Subtract the new number by the original number
81 - 475 = -394
-394 ÷ 475 = -0.8294736842105264
-0.8294736842105264 x 100 = -82.95%