2457.14% is the change from 21 to 537
Calculation steps:
[( 537 - 21 ) ÷ 21] x 100 = 2457.14%
Formula
Percentage change = [(537 - 21) / 21] x 100
Subtract the new number by the original number
537 - 21 = 516
516 ÷ 21 = 24.571428571428573
24.571428571428573 x 100 = 2457.14%