1. The problem asks to find 55% of 360 tonnes. 2. To find a percentage of a quantity, use the formula: $$\text{Percentage of quantity} = \frac{\text{percentage}}{100} \times \text{quantity}$$ 3. Here, the percentage is 55 and the quantity is 360 tonnes. 4. Substitute the values into the formula: $$\frac{55}{100} \times 360$$ 5. Simplify the fraction by canceling common factors: $$\frac{\cancel{55}}{\cancel{100}} \times 360 = \frac{11}{20} \times 360$$ 6. Multiply the fraction by 360: $$\frac{11}{20} \times 360 = 11 \times \frac{360}{20}$$ 7. Simplify $\frac{360}{20}$: $$\frac{360}{20} = 18$$ 8. Multiply 11 by 18: $$11 \times 18 = 198$$ 9. Therefore, 55% of 360 tonnes is 198 tonnes.