1928.57% is the change from 21 to 426
Calculation steps:
[( 426 - 21 ) ÷ 21] x 100 = 1928.57%
Formula
Percentage change = [(426 - 21) / 21] x 100
Subtract the new number by the original number
426 - 21 = 405
405 ÷ 21 = 19.285714285714285
19.285714285714285 x 100 = 1928.57%