2600% is the change from 23 to 621
Calculation steps:
[( 621 - 23 ) ÷ 23] x 100 = 2600%
Formula
Percentage change = [(621 - 23) / 23] x 100
Subtract the new number by the original number
621 - 23 = 598
598 ÷ 23 = 26
26 x 100 = 2600%
Example