-21.15% is the change from 799 to 630
Calculation steps:
[( 630 - 799 ) ÷ 799] x 100 = -21.15%
Formula
Percentage change = [(630 - 799) / 799] x 100
Subtract the new number by the original number
630 - 799 = -169
-169 ÷ 799 = -0.21151439299123906
-0.21151439299123906 x 100 = -21.15%