-56.68% is the change from 187 to 81
Calculation steps:
[( 81 - 187 ) ÷ 187] x 100 = -56.68%
Formula
Percentage change = [(81 - 187) / 187] x 100
Subtract the new number by the original number
81 - 187 = -106
-106 ÷ 187 = -0.5668449197860963
-0.5668449197860963 x 100 = -56.68%