-73.33% is the change from 821 to 219
Calculation steps:
[( 219 - 821 ) ÷ 821] x 100 = -73.33%
Formula
Percentage change = [(219 - 821) / 821] x 100
Subtract the new number by the original number
219 - 821 = -602
-602 ÷ 821 = -0.7332521315468941
-0.7332521315468941 x 100 = -73.33%