-84.6% is the change from 630 to 97
Calculation steps:
[( 97 - 630 ) ÷ 630] x 100 = -84.6%
Formula
Percentage change = [(97 - 630) / 630] x 100
Subtract the new number by the original number
97 - 630 = -533
-533 ÷ 630 = -0.846031746031746
-0.846031746031746 x 100 = -84.6%