-21.17% is the change from 822 to 648
Calculation steps:
[( 648 - 822 ) ÷ 822] x 100 = -21.17%
Formula
Percentage change = [(648 - 822) / 822] x 100
Subtract the new number by the original number
648 - 822 = -174
-174 ÷ 822 = -0.2116788321167883
-0.2116788321167883 x 100 = -21.17%