12.1% is the change from 438 to 491
Calculation steps:
[( 491 - 438 ) ÷ 438] x 100 = 12.1%
Formula
Percentage change = [(491 - 438) / 438] x 100
Subtract the new number by the original number
491 - 438 = 53
53 ÷ 438 = 0.12100456621004566
0.12100456621004566 x 100 = 12.1%