-57.81% is the change from 192 to 81
Calculation steps:
[( 81 - 192 ) ÷ 192] x 100 = -57.81%
Formula
Percentage change = [(81 - 192) / 192] x 100
Subtract the new number by the original number
81 - 192 = -111
-111 ÷ 192 = -0.578125
-0.578125 x 100 = -57.81%