68.02% is the change from 494 to 830
Calculation steps:
[( 830 - 494 ) ÷ 494] x 100 = 68.02%
Formula
Percentage change = [(830 - 494) / 494] x 100
Subtract the new number by the original number
830 - 494 = 336
336 ÷ 494 = 0.680161943319838
0.680161943319838 x 100 = 68.02%