-51.03% is the change from 145 to 71
Calculation steps:
[( 71 - 145 ) ÷ 145] x 100 = -51.03%
Formula
Percentage change = [(71 - 145) / 145] x 100
Subtract the new number by the original number
71 - 145 = -74
-74 ÷ 145 = -0.5103448275862069
-0.5103448275862069 x 100 = -51.03%