67.55% is the change from 490 to 821
Calculation steps:
[( 821 - 490 ) ÷ 490] x 100 = 67.55%
Formula
Percentage change = [(821 - 490) / 490] x 100
Subtract the new number by the original number
821 - 490 = 331
331 ÷ 490 = 0.6755102040816326
0.6755102040816326 x 100 = 67.55%