1590.48% is the change from 21 to 355
Calculation steps:
[( 355 - 21 ) ÷ 21] x 100 = 1590.48%
Formula
Percentage change = [(355 - 21) / 21] x 100
Subtract the new number by the original number
355 - 21 = 334
334 ÷ 21 = 15.904761904761905
15.904761904761905 x 100 = 1590.48%