2487.5% is the change from 24 to 621
Calculation steps:
[( 621 - 24 ) ÷ 24] x 100 = 2487.5%
Formula
Percentage change = [(621 - 24) / 24] x 100
Subtract the new number by the original number
621 - 24 = 597
597 ÷ 24 = 24.875
24.875 x 100 = 2487.5%
Example