82.58% is the change from 310 to 566
Calculation steps:
[( 566 - 310 ) ÷ 310] x 100 = 82.58%
Formula
Percentage change = [(566 - 310) / 310] x 100
Subtract the new number by the original number
566 - 310 = 256
256 ÷ 310 = 0.8258064516129032
0.8258064516129032 x 100 = 82.58%