121.79% is the change from 390 to 865
Calculation steps:
[( 865 - 390 ) ÷ 390] x 100 = 121.79%
Formula
Percentage change = [(865 - 390) / 390] x 100
Subtract the new number by the original number
865 - 390 = 475
475 ÷ 390 = 1.2179487179487178
1.2179487179487178 x 100 = 121.79%