-71.08% is the change from 287 to 83
Calculation steps:
[( 83 - 287 ) ÷ 287] x 100 = -71.08%
Formula
Percentage change = [(83 - 287) / 287] x 100
Subtract the new number by the original number
83 - 287 = -204
-204 ÷ 287 = -0.710801393728223
-0.710801393728223 x 100 = -71.08%