66.25% is the change from 397 to 660
Calculation steps:
[( 660 - 397 ) ÷ 397] x 100 = 66.25%
Formula
Percentage change = [(660 - 397) / 397] x 100
Subtract the new number by the original number
660 - 397 = 263
263 ÷ 397 = 0.6624685138539043
0.6624685138539043 x 100 = 66.25%