1547.62% is the change from 21 to 346
Calculation steps:
[( 346 - 21 ) ÷ 21] x 100 = 1547.62%
Formula
Percentage change = [(346 - 21) / 21] x 100
Subtract the new number by the original number
346 - 21 = 325
325 ÷ 21 = 15.476190476190476
15.476190476190476 x 100 = 1547.62%