2520% is the change from 20 to 524
Calculation steps:
[( 524 - 20 ) ÷ 20] x 100 = 2520%
Formula
Percentage change = [(524 - 20) / 20] x 100
Subtract the new number by the original number
524 - 20 = 504
504 ÷ 20 = 25.2
25.2 x 100 = 2520%
Example