320.33% is the change from 123 to 517
Calculation steps:
[( 517 - 123 ) ÷ 123] x 100 = 320.33%
Formula
Percentage change = [(517 - 123) / 123] x 100
Subtract the new number by the original number
517 - 123 = 394
394 ÷ 123 = 3.203252032520325
3.203252032520325 x 100 = 320.33%