57.03% is the change from 491 to 771
Calculation steps:
[( 771 - 491 ) ÷ 491] x 100 = 57.03%
Formula
Percentage change = [(771 - 491) / 491] x 100
Subtract the new number by the original number
771 - 491 = 280
280 ÷ 491 = 0.570264765784114
0.570264765784114 x 100 = 57.03%