4.28% is the change from 491 to 512
Calculation steps:
[( 512 - 491 ) ÷ 491] x 100 = 4.28%
Formula
Percentage change = [(512 - 491) / 491] x 100
Subtract the new number by the original number
512 - 491 = 21
21 ÷ 491 = 0.04276985743380855
0.04276985743380855 x 100 = 4.28%
Example