65.98% is the change from 388 to 644
Calculation steps:
[( 644 - 388 ) ÷ 388] x 100 = 65.98%
Formula
Percentage change = [(644 - 388) / 388] x 100
Subtract the new number by the original number
644 - 388 = 256
256 ÷ 388 = 0.6597938144329897
0.6597938144329897 x 100 = 65.98%