-23.63% is the change from 821 to 627
Calculation steps:
[( 627 - 821 ) ÷ 821] x 100 = -23.63%
Formula
Percentage change = [(627 - 821) / 821] x 100
Subtract the new number by the original number
627 - 821 = -194
-194 ÷ 821 = -0.23629719853836784
-0.23629719853836784 x 100 = -23.63%