70.2% is the change from 490 to 834
Calculation steps:
[( 834 - 490 ) ÷ 490] x 100 = 70.2%
Formula
Percentage change = [(834 - 490) / 490] x 100
Subtract the new number by the original number
834 - 490 = 344
344 ÷ 490 = 0.7020408163265306
0.7020408163265306 x 100 = 70.2%