Answer: 4.9
Step-by-step explanation:
You can use a calculator but I'll show you the step by step.
First, [tex]4 \frac{9}{10}[/tex] is a mixed number. To be able to divide it, convert it to an improper fraction. You can do this by multiplying the big number by the denominator and adding the numerator; all of this over the same denominator.
[tex]\frac{4*10+9}{10}=\frac{40+9}{10}=\frac{49}{10}[/tex]
Now, divide:
49/10=4.9
40
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9'0
90
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