66.93% is the change from 387 to 646
Calculation steps:
[( 646 - 387 ) ÷ 387] x 100 = 66.93%
Formula
Percentage change = [(646 - 387) / 387] x 100
Subtract the new number by the original number
646 - 387 = 259
259 ÷ 387 = 0.6692506459948321
0.6692506459948321 x 100 = 66.93%