2480.95% is the change from 21 to 542
Calculation steps:
[( 542 - 21 ) ÷ 21] x 100 = 2480.95%
Formula
Percentage change = [(542 - 21) / 21] x 100
Subtract the new number by the original number
542 - 21 = 521
521 ÷ 21 = 24.80952380952381
24.80952380952381 x 100 = 2480.95%