2490.48% is the change from 21 to 544
Calculation steps:
[( 544 - 21 ) ÷ 21] x 100 = 2490.48%
Formula
Percentage change = [(544 - 21) / 21] x 100
Subtract the new number by the original number
544 - 21 = 523
523 ÷ 21 = 24.904761904761905
24.904761904761905 x 100 = 2490.48%