1942.86% is the change from 21 to 429
Calculation steps:
[( 429 - 21 ) ÷ 21] x 100 = 1942.86%
Formula
Percentage change = [(429 - 21) / 21] x 100
Subtract the new number by the original number
429 - 21 = 408
408 ÷ 21 = 19.428571428571427
19.428571428571427 x 100 = 1942.86%