57.37% is the change from 312 to 491
Calculation steps:
[( 491 - 312 ) ÷ 312] x 100 = 57.37%
Formula
Percentage change = [(491 - 312) / 312] x 100
Subtract the new number by the original number
491 - 312 = 179
179 ÷ 312 = 0.5737179487179487
0.5737179487179487 x 100 = 57.37%