-75.09% is the change from 285 to 71
Calculation steps:
[( 71 - 285 ) ÷ 285] x 100 = -75.09%
Formula
Percentage change = [(71 - 285) / 285] x 100
Subtract the new number by the original number
71 - 285 = -214
-214 ÷ 285 = -0.7508771929824561
-0.7508771929824561 x 100 = -75.09%