70.88% is the change from 388 to 663
Calculation steps:
[( 663 - 388 ) ÷ 388] x 100 = 70.88%
Formula
Percentage change = [(663 - 388) / 388] x 100
Subtract the new number by the original number
663 - 388 = 275
275 ÷ 388 = 0.7087628865979382
0.7087628865979382 x 100 = 70.88%