69.59% is the change from 490 to 831
Calculation steps:
[( 831 - 490 ) ÷ 490] x 100 = 69.59%
Formula
Percentage change = [(831 - 490) / 490] x 100
Subtract the new number by the original number
831 - 490 = 341
341 ÷ 490 = 0.6959183673469388
0.6959183673469388 x 100 = 69.59%