-57.14% is the change from 189 to 81
Calculation steps:
[( 81 - 189 ) ÷ 189] x 100 = -57.14%
Formula
Percentage change = [(81 - 189) / 189] x 100
Subtract the new number by the original number
81 - 189 = -108
-108 ÷ 189 = -0.5714285714285714
-0.5714285714285714 x 100 = -57.14%