291.26% is the change from 103 to 403
Calculation steps:
[( 403 - 103 ) ÷ 103] x 100 = 291.26%
Formula
Percentage change = [(403 - 103) / 103] x 100
Subtract the new number by the original number
403 - 103 = 300
300 ÷ 103 = 2.912621359223301
2.912621359223301 x 100 = 291.26%