1728.57% is the change from 21 to 384
Calculation steps:
[( 384 - 21 ) ÷ 21] x 100 = 1728.57%
Formula
Percentage change = [(384 - 21) / 21] x 100
Subtract the new number by the original number
384 - 21 = 363
363 ÷ 21 = 17.285714285714285
17.285714285714285 x 100 = 1728.57%