2271.43% is the change from 21 to 498
Calculation steps:
[( 498 - 21 ) ÷ 21] x 100 = 2271.43%
Formula
Percentage change = [(498 - 21) / 21] x 100
Subtract the new number by the original number
498 - 21 = 477
477 ÷ 21 = 22.714285714285715
22.714285714285715 x 100 = 2271.43%