51.37% is the change from 549 to 831
Calculation steps:
[( 831 - 549 ) ÷ 549] x 100 = 51.37%
Formula
Percentage change = [(831 - 549) / 549] x 100
Subtract the new number by the original number
831 - 549 = 282
282 ÷ 549 = 0.5136612021857924
0.5136612021857924 x 100 = 51.37%