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Earlier discussion
1 older comment kept for context.
Oluwaseun Adeyemi
Let the monthly expenditure on school fees be x let the monthly expenditure on housing be 2x; angle of housing and school fee in a pie chart = 360\(^{\circ}\) - (120\(^{\circ}\) + 90\(^{\circ}\))
= 360\(^{\circ}\) - 210\(^{\circ}\) = 150\(^{\circ}\)
Angle of housing in a pie-chart = \(\frac{2}{3}\) x 150 = 100
\(\frac{100}{360}\) x 7200 = N2,000