30.32% is the change from 630 to 821
Calculation steps:
[( 821 - 630 ) ÷ 630] x 100 = 30.32%
Formula
Percentage change = [(821 - 630) / 630] x 100
Subtract the new number by the original number
821 - 630 = 191
191 ÷ 630 = 0.30317460317460315
0.30317460317460315 x 100 = 30.32%