56.82% is the change from 491 to 770
Calculation steps:
[( 770 - 491 ) ÷ 491] x 100 = 56.82%
Formula
Percentage change = [(770 - 491) / 491] x 100
Subtract the new number by the original number
770 - 491 = 279
279 ÷ 491 = 0.5682281059063137
0.5682281059063137 x 100 = 56.82%