A farmer deposited some money (principal) at a simple interest rate. We are given the total amount after 2 years and the interest rate. Calculate the principal amount.

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Question 18a)
To express the sector for "Others" as a percentage, we first need its angle. Based on the calculation shown next to the question, we assume the angle for "Others" is $110^\circ$.

Step 1: Identify the angle for the sector "Others".
The angle for "Others" is $110^\circ$.

Step 2: Calculate the percentage.
The percentage is found by dividing the sector angle by the total angle in a circle ($360^\circ$) and multiplying by $100\%$.

$$\text{Percentage for Others} = \frac{\text{Angle of sector}}{\text{Total angle}} \times 100\%$$ $$\text{Percentage for Others} = \frac{110^\circ}{360^\circ} \times 100\%$$

Step 3: Perform the calculation.

$$\text{Percentage for Others} = \frac{11}{36} \times 100\%$$ $$\text{Percentage for Others} = \frac{1100}{36}\%$$ $$\text{Percentage for Others} = \frac{275}{9}\%$$ $$\text{Percentage for Others} \approx 30.555...\%$$

Rounding to one decimal place:

$$\text{Percentage for Others} \approx \boxed{30.6\%}$$