39.7% is the change from 199 to 278
Calculation steps:
[( 278 - 199 ) ÷ 199] x 100 = 39.7%
Formula
Percentage change = [(278 - 199) / 199] x 100
Subtract the new number by the original number
278 - 199 = 79
79 ÷ 199 = 0.3969849246231156
0.3969849246231156 x 100 = 39.7%