-98.89% is the change from 630 to 7
Calculation steps:
[( 7 - 630 ) ÷ 630] x 100 = -98.89%
Formula
Percentage change = [(7 - 630) / 630] x 100
Subtract the new number by the original number
7 - 630 = -623
-623 ÷ 630 = -0.9888888888888889
-0.9888888888888889 x 100 = -98.89%