34.69% is the change from 490 to 660
Calculation steps:
[( 660 - 490 ) ÷ 490] x 100 = 34.69%
Formula
Percentage change = [(660 - 490) / 490] x 100
Subtract the new number by the original number
660 - 490 = 170
170 ÷ 490 = 0.3469387755102041
0.3469387755102041 x 100 = 34.69%