66.07% is the change from 389 to 646
Calculation steps:
[( 646 - 389 ) ÷ 389] x 100 = 66.07%
Formula
Percentage change = [(646 - 389) / 389] x 100
Subtract the new number by the original number
646 - 389 = 257
257 ÷ 389 = 0.6606683804627249
0.6606683804627249 x 100 = 66.07%