Final answer:
The percentage increase from $5.49 to $8.99 is calculated by finding the difference ($3.50), dividing it by the original cost ($5.49), and then multiplying the result by 100 to get approximately 63.75%.
Step-by-step explanation:
To calculate the percentage increase in cost from $5.49 to $8.99, you must first find the difference in cost and then divide that by the original cost:
- Difference in cost = New cost - Original cost = $8.99 - $5.49 = $3.50.
- To find the percentage increase, divide the difference by the original cost: $3.50 / $5.49.
- Multiply the result by 100 to get the percentage: ($3.50 / $5.49) × 100 ≈ 63.75%.
The percentage increase in cost from $5.49 to $8.99 is approximately 63.75%.