2376.19% is the change from 21 to 520
Calculation steps:
[( 520 - 21 ) ÷ 21] x 100 = 2376.19%
Formula
Percentage change = [(520 - 21) / 21] x 100
Subtract the new number by the original number
520 - 21 = 499
499 ÷ 21 = 23.761904761904763
23.761904761904763 x 100 = 2376.19%