77.06% is the change from 388 to 687
Calculation steps:
[( 687 - 388 ) ÷ 388] x 100 = 77.06%
Formula
Percentage change = [(687 - 388) / 388] x 100
Subtract the new number by the original number
687 - 388 = 299
299 ÷ 388 = 0.770618556701031
0.770618556701031 x 100 = 77.06%