-37.15% is the change from 821 to 516
Calculation steps:
[( 516 - 821 ) ÷ 821] x 100 = -37.15%
Formula
Percentage change = [(516 - 821) / 821] x 100
Subtract the new number by the original number
516 - 821 = -305
-305 ÷ 821 = -0.37149817295980514
-0.37149817295980514 x 100 = -37.15%