3461.9% is the change from 21 to 748
Calculation steps:
[( 748 - 21 ) ÷ 21] x 100 = 3461.9%
Formula
Percentage change = [(748 - 21) / 21] x 100
Subtract the new number by the original number
748 - 21 = 727
727 ÷ 21 = 34.61904761904762
34.61904761904762 x 100 = 3461.9%