-65.41% is the change from 821 to 284
Calculation steps:
[( 284 - 821 ) ÷ 821] x 100 = -65.41%
Formula
Percentage change = [(284 - 821) / 821] x 100
Subtract the new number by the original number
284 - 821 = -537
-537 ÷ 821 = -0.6540803897685749
-0.6540803897685749 x 100 = -65.41%