81.44% is the change from 388 to 704
Calculation steps:
[( 704 - 388 ) ÷ 388] x 100 = 81.44%
Formula
Percentage change = [(704 - 388) / 388] x 100
Subtract the new number by the original number
704 - 388 = 316
316 ÷ 388 = 0.8144329896907216
0.8144329896907216 x 100 = 81.44%