-50.35% is the change from 143 to 71
Calculation steps:
[( 71 - 143 ) ÷ 143] x 100 = -50.35%
Formula
Percentage change = [(71 - 143) / 143] x 100
Subtract the new number by the original number
71 - 143 = -72
-72 ÷ 143 = -0.5034965034965035
-0.5034965034965035 x 100 = -50.35%