104.6% is the change from 391 to 800
Calculation steps:
[( 800 - 391 ) ÷ 391] x 100 = 104.6%
Formula
Percentage change = [(800 - 391) / 391] x 100
Subtract the new number by the original number
800 - 391 = 409
409 ÷ 391 = 1.0460358056265984
1.0460358056265984 x 100 = 104.6%