-38.32% is the change from 822 to 507
Calculation steps:
[( 507 - 822 ) ÷ 822] x 100 = -38.32%
Formula
Percentage change = [(507 - 822) / 822] x 100
Subtract the new number by the original number
507 - 822 = -315
-315 ÷ 822 = -0.38321167883211676
-0.38321167883211676 x 100 = -38.32%