-90.32% is the change from 630 to 61
Calculation steps:
[( 61 - 630 ) ÷ 630] x 100 = -90.32%
Formula
Percentage change = [(61 - 630) / 630] x 100
Subtract the new number by the original number
61 - 630 = -569
-569 ÷ 630 = -0.9031746031746032
-0.9031746031746032 x 100 = -90.32%