2252.38% is the change from 21 to 494
Calculation steps:
[( 494 - 21 ) ÷ 21] x 100 = 2252.38%
Formula
Percentage change = [(494 - 21) / 21] x 100
Subtract the new number by the original number
494 - 21 = 473
473 ÷ 21 = 22.523809523809526
22.523809523809526 x 100 = 2252.38%