-51.11% is the change from 630 to 308
Calculation steps:
[( 308 - 630 ) ÷ 630] x 100 = -51.11%
Formula
Percentage change = [(308 - 630) / 630] x 100
Subtract the new number by the original number
308 - 630 = -322
-322 ÷ 630 = -0.5111111111111111
-0.5111111111111111 x 100 = -51.11%