-20.79% is the change from 630 to 499
Calculation steps:
[( 499 - 630 ) ÷ 630] x 100 = -20.79%
Formula
Percentage change = [(499 - 630) / 630] x 100
Subtract the new number by the original number
499 - 630 = -131
-131 ÷ 630 = -0.20793650793650795
-0.20793650793650795 x 100 = -20.79%