-65.28% is the change from 815 to 283
Calculation steps:
[( 283 - 815 ) ÷ 815] x 100 = -65.28%
Formula
Percentage change = [(283 - 815) / 815] x 100
Subtract the new number by the original number
283 - 815 = -532
-532 ÷ 815 = -0.652760736196319
-0.652760736196319 x 100 = -65.28%