-8.98% is the change from 902 to 821
Calculation steps:
[( 821 - 902 ) ÷ 902] x 100 = -8.98%
Formula
Percentage change = [(821 - 902) / 902] x 100
Subtract the new number by the original number
821 - 902 = -81
-81 ÷ 902 = -0.08980044345898004
-0.08980044345898004 x 100 = -8.98%