Final answer:
The percentage increase in the price of an item that has gone from $110 to $297 is calculated using the formula (New Price - Original Price) / Original Price x 100%, resulting in a 170% increase.
Step-by-step explanation:
To find the percentage increase in the price of an item that has risen from $110 to $297, you would use the formula for calculating percentage change. The formula is:
Percentage Increase = ((New Price - Original Price) / Original Price) x 100%
Plugging in the numbers:
Percentage Increase = (($297 - $110) / $110) x 100%
Percentage Increase = ($187 / $110) x 100%
Percentage Increase = 1.7 x 100%
Percentage Increase = 170%
Therefore, the price of the item has increased by 170% from yesterday to today.