-75.64% is the change from 821 to 200
Calculation steps:
[( 200 - 821 ) ÷ 821] x 100 = -75.64%
Formula
Percentage change = [(200 - 821) / 821] x 100
Subtract the new number by the original number
200 - 821 = -621
-621 ÷ 821 = -0.756394640682095
-0.756394640682095 x 100 = -75.64%