-75.26% is the change from 287 to 71
Calculation steps:
[( 71 - 287 ) ÷ 287] x 100 = -75.26%
Formula
Percentage change = [(71 - 287) / 287] x 100
Subtract the new number by the original number
71 - 287 = -216
-216 ÷ 287 = -0.7526132404181185
-0.7526132404181185 x 100 = -75.26%