-43.75% is the change from 144 to 81
Calculation steps:
[( 81 - 144 ) ÷ 144] x 100 = -43.75%
Formula
Percentage change = [(81 - 144) / 144] x 100
Subtract the new number by the original number
81 - 144 = -63
-63 ÷ 144 = -0.4375
-0.4375 x 100 = -43.75%