-2.31% is the change from 821 to 802
Calculation steps:
[( 802 - 821 ) ÷ 821] x 100 = -2.31%
Formula
Percentage change = [(802 - 821) / 821] x 100
Subtract the new number by the original number
802 - 821 = -19
-19 ÷ 821 = -0.023142509135200974
-0.023142509135200974 x 100 = -2.31%