BECE Mathematics 2014 Paper

Concept:In a pie chart, the percentage for any sector is given by $\frac{\text{sector angle}}{360^\circ} \times 100\%$.Explanation:The combined central angle for rent and utilities in the pie chart is $80^\circ$.A full circle is $360^\circ$, which represents $100\%$ of the salary.Therefore, the required percentage is $\frac{80}{360} \times 100\%$.Simplify the fraction: $\frac{80}{360} = \frac{2}{9}$.Then, $\frac{2}{9} \times 100 = 22.22$, approximately.So, Kwaku spends about $22.2\%$ of his monthly salary on rent and utilities.Answer:$22.2\%$The correct option is C.