2342.86% is the change from 21 to 513
Calculation steps:
[( 513 - 21 ) ÷ 21] x 100 = 2342.86%
Formula
Percentage change = [(513 - 21) / 21] x 100
Subtract the new number by the original number
513 - 21 = 492
492 ÷ 21 = 23.428571428571427
23.428571428571427 x 100 = 2342.86%