https://file.aiquickdraw.com/mathbot/file/1729355583103k1wt2gbf.jpg

The problem in the image asks to find the percentage increase in the price of an item, which was $80 yesterday and has risen to $172 today.

To find the percentage increase, use the formula:

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

Substitute the values:

\[
\text{Percentage Increase} = \left( \frac{172 - 80}{80} \right) \times 100
\]
\[
\text{Percentage Increase} = \left( \frac{92}{80} \right) \times 100 = 1.15 \times 100 = 115\%
\]

So, the percentage increase is **115%**.

Would you like more details or have any questions? 

Here are some related questions:
1. How do we calculate percentage decreases?
2. What if the old price was $150 and the new price was $200?
3. Can you explain how percentage change differs from percentage points?
4. What happens if the price drops below the original price—how would that affect the percentage?
5. How can we apply this method to real-life financial problems, like stock price changes?

**Tip:** Always check whether the question asks for a percentage increase or decrease before applying the formula!

The price of an item has risen to $172 today. Yesterday it was $80. Find the percentage increase.

Learn how to calculate the percentage increase when the price of an item rises from $80 to $172. This problem focuses on percentage increase using basic algebra. Suitable for students in Grades 7-9.

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