-73.93% is the change from 821 to 214
Calculation steps:
[( 214 - 821 ) ÷ 821] x 100 = -73.93%
Formula
Percentage change = [(214 - 821) / 821] x 100
Subtract the new number by the original number
214 - 821 = -607
-607 ÷ 821 = -0.7393422655298416
-0.7393422655298416 x 100 = -73.93%