60.46% is the change from 306 to 491
Calculation steps:
[( 491 - 306 ) ÷ 306] x 100 = 60.46%
Formula
Percentage change = [(491 - 306) / 306] x 100
Subtract the new number by the original number
491 - 306 = 185
185 ÷ 306 = 0.6045751633986928
0.6045751633986928 x 100 = 60.46%