-99.15% is the change from 822 to 7
Calculation steps:
[( 7 - 822 ) ÷ 822] x 100 = -99.15%
Formula
Percentage change = [(7 - 822) / 822] x 100
Subtract the new number by the original number
7 - 822 = -815
-815 ÷ 822 = -0.9914841849148418
-0.9914841849148418 x 100 = -99.15%