-48.78% is the change from 822 to 421
Calculation steps:
[( 421 - 822 ) ÷ 822] x 100 = -48.78%
Formula
Percentage change = [(421 - 822) / 822] x 100
Subtract the new number by the original number
421 - 822 = -401
-401 ÷ 822 = -0.4878345498783455
-0.4878345498783455 x 100 = -48.78%