54.4% is the change from 318 to 491
Calculation steps:
[( 491 - 318 ) ÷ 318] x 100 = 54.4%
Formula
Percentage change = [(491 - 318) / 318] x 100
Subtract the new number by the original number
491 - 318 = 173
173 ÷ 318 = 0.5440251572327044
0.5440251572327044 x 100 = 54.4%