34.97% is the change from 489 to 660
Calculation steps:
[( 660 - 489 ) ÷ 489] x 100 = 34.97%
Formula
Percentage change = [(660 - 489) / 489] x 100
Subtract the new number by the original number
660 - 489 = 171
171 ÷ 489 = 0.3496932515337423
0.3496932515337423 x 100 = 34.97%