123% is the change from 387 to 863
Calculation steps:
[( 863 - 387 ) ÷ 387] x 100 = 123%
Formula
Percentage change = [(863 - 387) / 387] x 100
Subtract the new number by the original number
863 - 387 = 476
476 ÷ 387 = 1.2299741602067182
1.2299741602067182 x 100 = 123%