Resposta:

[tex]4830 - 4200 = 630[/tex]

[tex]4200 ----- 100%[/tex]%

[tex]630 ------ x[/tex]

[tex]4200x = 630 . 100[/tex]

[tex]4200x = 63000[/tex]

[tex]x = \frac{63000}{4200}[/tex]

[tex]x = 15[/tex]

O frete representa 15% do valor inicial.