-17.24% is the change from 992 to 821
Calculation steps:
[( 821 - 992 ) ÷ 992] x 100 = -17.24%
Formula
Percentage change = [(821 - 992) / 992] x 100
Subtract the new number by the original number
821 - 992 = -171
-171 ÷ 992 = -0.17237903225806453
-0.17237903225806453 x 100 = -17.24%