2110% is the change from 30 to 663
Calculation steps:
[( 663 - 30 ) ÷ 30] x 100 = 2110%
Formula
Percentage change = [(663 - 30) / 30] x 100
Subtract the new number by the original number
663 - 30 = 633
633 ÷ 30 = 21.1
21.1 x 100 = 2110%
Example