-65.04% is the change from 821 to 287
Calculation steps:
[( 287 - 821 ) ÷ 821] x 100 = -65.04%
Formula
Percentage change = [(287 - 821) / 821] x 100
Subtract the new number by the original number
287 - 821 = -534
-534 ÷ 821 = -0.6504263093788063
-0.6504263093788063 x 100 = -65.04%