70.1% is the change from 388 to 660
Calculation steps:
[( 660 - 388 ) ÷ 388] x 100 = 70.1%
Formula
Percentage change = [(660 - 388) / 388] x 100
Subtract the new number by the original number
660 - 388 = 272
272 ÷ 388 = 0.7010309278350515
0.7010309278350515 x 100 = 70.1%