-43.36% is the change from 143 to 81
Calculation steps:
[( 81 - 143 ) ÷ 143] x 100 = -43.36%
Formula
Percentage change = [(81 - 143) / 143] x 100
Subtract the new number by the original number
81 - 143 = -62
-62 ÷ 143 = -0.43356643356643354
-0.43356643356643354 x 100 = -43.36%