-31.75% is the change from 630 to 430
Calculation steps:
[( 430 - 630 ) ÷ 630] x 100 = -31.75%
Formula
Percentage change = [(430 - 630) / 630] x 100
Subtract the new number by the original number
430 - 630 = -200
-200 ÷ 630 = -0.31746031746031744
-0.31746031746031744 x 100 = -31.75%