(a)
| Items | Percentage(%) | Degree in pie chart |
| Pension | 5 | \(\frac{5}{100} \times 360° = 18°\) |
| Income tax | 25 | \(\frac{25}{100} \times 360° = 90°\) |
| Food | 40 | \(\frac{40}{100} \times 360° = 144°\) |
| Transport | 10 | \(\frac{10}{100} \times 360° = 36°\) |
| Rent | 12.5 | \(\frac{12.5}{100} \times 360° = 45°\) |
| Others | 7.5 | \(\frac{7.5}{100} \times 360° = 27°\) |
| | 100 | 360° |
A pie- chart showing the monthly contributions and expenditure pattern of an employee in 1999.
(b)(i) \(360° = N10,800.00\)
\(\text{Pension} - 18° = \frac{18}{360} \times N10,800\)
= \(N540\)
(ii) \(360° = N10,800.00\)
\(\text{Income tax} - 90° = \frac{90}{360} \times N10,800\)
= \(N2700\)
(c) The percentage sum of pension and income tax = (5 + 25)% = 30%
Take home pay = 100% - 30% = 70%
= \(\frac{70}{100} \times N10,800\)
= \(N7560\)
