347.15% is the change from 123 to 550
Calculation steps:
[( 550 - 123 ) ÷ 123] x 100 = 347.15%
Formula
Percentage change = [(550 - 123) / 123] x 100
Subtract the new number by the original number
550 - 123 = 427
427 ÷ 123 = 3.4715447154471546
3.4715447154471546 x 100 = 347.15%