39.71% is the change from 277 to 387
Calculation steps:
[( 387 - 277 ) ÷ 277] x 100 = 39.71%
Formula
Percentage change = [(387 - 277) / 277] x 100
Subtract the new number by the original number
387 - 277 = 110
110 ÷ 277 = 0.3971119133574007
0.3971119133574007 x 100 = 39.71%