Zilla spent 7% of her monthly earnings on rent, half of it on her other monthly expenses, and put the rest in her savings. If she spent $133 on her rent, how much does she deposit into her savings account in a month?
Let's be accurate as possible and think first.
817
Since $133 is equal to 7% of her earnings, then 1% is equal to $133 / 7 = $19.

The total monthly earning of Zilla is represented by 100%, so $19 x 100 = $1900 is her monthly earnings.

So, $1900 / 2 = $950 is spent on her other monthly expenses.

The total amount spent on the rent and other monthly expenses is $133 + $950 = $1083.

Hence, she saves $1900 - $1083 = $817 per month.

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The answer: 817