Final answer:
The percentage increase in the price of the item is calculated by subtracting the old price from the new price, dividing the result by the old price, and multiplying by 100, resulting in a 135% increase.
Step-by-step explanation:
To calculate the percentage increase in the price of an item, you need to follow these steps:
Next, divide the difference in price by the original price to find the increase in proportion to the original price. So you would calculate $162 ÷ $120 = 1.35.
Finally, convert this number into a percentage by multiplying it by 100. Therefore, 1.35 × 100 gives us a percentage increase of 135%.
So, the price of the item has increased by 135% from yesterday to today.