30.63% is the change from 630 to 823
Calculation steps:
[( 823 - 630 ) ÷ 630] x 100 = 30.63%
Formula
Percentage change = [(823 - 630) / 630] x 100
Subtract the new number by the original number
823 - 630 = 193
193 ÷ 630 = 0.30634920634920637
0.30634920634920637 x 100 = 30.63%