-20.95% is the change from 797 to 630
Calculation steps:
[( 630 - 797 ) ÷ 797] x 100 = -20.95%
Formula
Percentage change = [(630 - 797) / 797] x 100
Subtract the new number by the original number
630 - 797 = -167
-167 ÷ 797 = -0.2095357590966123
-0.2095357590966123 x 100 = -20.95%