391% is the change from 100 to 491
Calculation steps:
[( 491 - 100 ) ÷ 100] x 100 = 391%
Formula
Percentage change = [(491 - 100) / 100] x 100
Subtract the new number by the original number
491 - 100 = 391
391 ÷ 100 = 3.91
3.91 x 100 = 391%
Example