66.77% is the change from 310 to 517
Calculation steps:
[( 517 - 310 ) ÷ 310] x 100 = 66.77%
Formula
Percentage change = [(517 - 310) / 310] x 100
Subtract the new number by the original number
517 - 310 = 207
207 ÷ 310 = 0.667741935483871
0.667741935483871 x 100 = 66.77%