77.94% is the change from 399 to 710
Calculation steps:
[( 710 - 399 ) ÷ 399] x 100 = 77.94%
Formula
Percentage change = [(710 - 399) / 399] x 100
Subtract the new number by the original number
710 - 399 = 311
311 ÷ 399 = 0.7794486215538847
0.7794486215538847 x 100 = 77.94%