-30.46% is the change from 906 to 630
Calculation steps:
[( 630 - 906 ) ÷ 906] x 100 = -30.46%
Formula
Percentage change = [(630 - 906) / 906] x 100
Subtract the new number by the original number
630 - 906 = -276
-276 ÷ 906 = -0.304635761589404
-0.304635761589404 x 100 = -30.46%