Answer:
[tex]=\frac{4}{51}[/tex]
Step-by-step explanation:
[tex]\frac{20}{40+25+20+35+20+30+20+30+35}[/tex]
[tex]\mathrm{Add\:the\:numbers:}\:40+25+20+35+20+30+20+30+35=255[/tex]
[tex]=\frac{20}{255}[/tex]
Simplify, because both are common factors of 5, you divide both numbers by 5 which gives you
[tex]=\frac{4}{51}[/tex]
