121.28% is the change from 390 to 863
Calculation steps:
[( 863 - 390 ) ÷ 390] x 100 = 121.28%
Formula
Percentage change = [(863 - 390) / 390] x 100
Subtract the new number by the original number
863 - 390 = 473
473 ÷ 390 = 1.2128205128205127
1.2128205128205127 x 100 = 121.28%