115.9% is the change from 390 to 842
Calculation steps:
[( 842 - 390 ) ÷ 390] x 100 = 115.9%
Formula
Percentage change = [(842 - 390) / 390] x 100
Subtract the new number by the original number
842 - 390 = 452
452 ÷ 390 = 1.158974358974359
1.158974358974359 x 100 = 115.9%