70.41% is the change from 490 to 835
Calculation steps:
[( 835 - 490 ) ÷ 490] x 100 = 70.41%
Formula
Percentage change = [(835 - 490) / 490] x 100
Subtract the new number by the original number
835 - 490 = 345
345 ÷ 490 = 0.7040816326530612
0.7040816326530612 x 100 = 70.41%