21.63% is the change from 319 to 388
Calculation steps:
[( 388 - 319 ) ÷ 319] x 100 = 21.63%
Formula
Percentage change = [(388 - 319) / 319] x 100
Subtract the new number by the original number
388 - 319 = 69
69 ÷ 319 = 0.21630094043887146
0.21630094043887146 x 100 = 21.63%