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The problem asks to calculate the percentage increase in cost from £520 to £800. The formula for percentage increase is:

\[
\text{Percentage Increase} = \left( \frac{\text{New Value} - \text{Original Value}}{\text{Original Value}} \right) \times 100
\]

Substituting the values:

\[
\text{Percentage Increase} = \left( \frac{800 - 520}{520} \right) \times 100
\]

Now I'll calculate that.The percentage increase in cost is approximately **53.85%**, rounded to two significant figures.

Would you like more details or have any questions about this? Here are some related questions to expand the concept:

1. How would the percentage increase change if the new value was £900 instead of £800?
2. What would the percentage decrease be if the price dropped from £800 to £400?
3. How can we calculate percentage increase if the change is expressed as a percentage of the new value rather than the original?
4. What is the percentage increase from £1000 to £1200?
5. How can this method be applied to real-life budgeting situations, such as planning holidays?

**Tip:** Always check the units and ensure consistency when calculating percentage changes, as mixing units (e.g., hours vs. days) can lead to incorrect results.

The 'off-peak' weekly average cost of hiring a caravan in Wales is £520. In July the average cost increases to £800. Calculate the percentage increase in cost. Give your answer to 2 significant figures.

Learn how to calculate the percentage increase in cost when the price of hiring a caravan in Wales rises from £520 to £800. This problem covers the percentage change formula and is suitable for students in Grades 7-9. Includes a step-by-step solution with two significant figures.

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