-75.89% is the change from 336 to 81
Calculation steps:
[( 81 - 336 ) ÷ 336] x 100 = -75.89%
Formula
Percentage change = [(81 - 336) / 336] x 100
Subtract the new number by the original number
81 - 336 = -255
-255 ÷ 336 = -0.7589285714285714
-0.7589285714285714 x 100 = -75.89%