81.7% is the change from 388 to 705
Calculation steps:
[( 705 - 388 ) ÷ 388] x 100 = 81.7%
Formula
Percentage change = [(705 - 388) / 388] x 100
Subtract the new number by the original number
705 - 388 = 317
317 ÷ 388 = 0.8170103092783505
0.8170103092783505 x 100 = 81.7%