Discussion
Find the percentage of expenses on sector 'Food' :
Answer: B
Food accounts for 30% of the expenses.
A sector's share of the total is its angle divided by 360°:
\[ \frac{108}{360} \times 100 = 30\% \]
25% would be a 90° sector, the 'other' expenses, and 20% a 72° sector, house rent. 90% confuses the 'other' sector's angle with a percentage.
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