-15.88% is the change from 976 to 821
Calculation steps:
[( 821 - 976 ) ÷ 976] x 100 = -15.88%
Formula
Percentage change = [(821 - 976) / 976] x 100
Subtract the new number by the original number
821 - 976 = -155
-155 ÷ 976 = -0.15881147540983606
-0.15881147540983606 x 100 = -15.88%