Final answer:
The percentage increase in the price of an item that has risen from $130 to $351 is found to be 170% by subtracting the original price from the new price, dividing the increase by the original price, and then multiplying by 100.
Step-by-step explanation:
To find the percentage increase in the price of an item, you subtract the original price from the new price to determine the amount of increase. Then, you divide the increase by the original price. Finally, multiply the result by 100 to convert it to a percentage.
Let's calculate the percentage increase from $130 to $351:
- Find the amount of increase: $351 - $130 = $221.
- Divide the increase by the original price: $221 / $130 ≈ 1.7.
- Multiply by 100 to find the percentage: 1.7 * 100 = 170%.
Therefore, the price of the item has increased by 170%.