Question

0.55 written as a decimal or mixed number in simplest form

Answer 1

$\frac{.55}{1} \times \frac{10}{10} = \frac{5.5}{10} \times \frac{10}{10 } = \frac{55}{100} \\ or \\ \frac{.55}{1} \times \frac{100}{100} = \frac{55}{100} \\ simplified$
$\frac{55}{100} \div \frac{5}{5} = \frac{11}{20}$

Answer 2

I guess you meant "write as a fraction".

$0.55=\dfrac{55}{100}=\dfrac{11}{20}$