-54.32% is the change from 81 to 37
Calculation steps:
[( 37 - 81 ) ÷ 81] x 100 = -54.32%
Formula
Percentage change = [(37 - 81) / 81] x 100
Subtract the new number by the original number
37 - 81 = -44
-44 ÷ 81 = -0.5432098765432098
-0.5432098765432098 x 100 = -54.32%