343.09% is the change from 123 to 545
Calculation steps:
[( 545 - 123 ) ÷ 123] x 100 = 343.09%
Formula
Percentage change = [(545 - 123) / 123] x 100
Subtract the new number by the original number
545 - 123 = 422
422 ÷ 123 = 3.430894308943089
3.430894308943089 x 100 = 343.09%