-20.34% is the change from 821 to 654
Calculation steps:
[( 654 - 821 ) ÷ 821] x 100 = -20.34%
Formula
Percentage change = [(654 - 821) / 821] x 100
Subtract the new number by the original number
654 - 821 = -167
-167 ÷ 821 = -0.20341047503045068
-0.20341047503045068 x 100 = -20.34%