-44.14% is the change from 145 to 81
Calculation steps:
[( 81 - 145 ) ÷ 145] x 100 = -44.14%
Formula
Percentage change = [(81 - 145) / 145] x 100
Subtract the new number by the original number
81 - 145 = -64
-64 ÷ 145 = -0.4413793103448276
-0.4413793103448276 x 100 = -44.14%