57.88% is the change from 311 to 491
Calculation steps:
[( 491 - 311 ) ÷ 311] x 100 = 57.88%
Formula
Percentage change = [(491 - 311) / 311] x 100
Subtract the new number by the original number
491 - 311 = 180
180 ÷ 311 = 0.5787781350482315
0.5787781350482315 x 100 = 57.88%