In the first hour after opening, a bakery sold 80 muffins. However, in the second hour, they only sold 64 muffins.

What is the percent decrease in muffin sales?
A.40% decrease
B.20% decrease
C.15% decrease
D.16% decrease

To calculate the percent decrease in muffin sales, we use the formula:

\[
\text{Percent Decrease} = \frac{\text{Initial Value} - \text{Final Value}}{\text{Initial Value}} \times 100
\]

In this case:
- Initial Value (first hour sales) = 80 muffins
- Final Value (second hour sales) = 64 muffins

Now, substitute the values into the formula:

\[
\text{Percent Decrease} = \frac{80 - 64}{80} \times 100 = \frac{16}{80} \times 100 = 0.2 \times 100 = 20\%
\]

Thus, the percent decrease in muffin sales is:

\[
\boxed{20\%}
\]

The correct answer is **B. 20% decrease**.

Would you like more details or have any other questions?

Here are 5 related questions for further practice:
1. If the bakery sold 50 muffins in the third hour, what would be the percent decrease from the second hour to the third hour?
2. How many muffins would the bakery need to sell in the second hour for there to be a 50% decrease?
3. If the bakery sold 100 muffins in the first hour and 70 muffins in the second hour, what would be the percent decrease?
4. What is the percent decrease if the sales dropped from 120 muffins to 96 muffins?
5. If the bakery sold 80 muffins in the first hour, how many muffins would need to be sold in the second hour for a 25% decrease?

**Tip:** When calculating percent decrease, always subtract the smaller number from the larger one to avoid negative results.

In the first hour after opening, a bakery sold 80 muffins. However, in the second hour, they only sold 64 muffins. What is the percent decrease in muffin sales?
A. 40% decrease
B. 20% decrease
C. 15% decrease
D. 16% decrease

Learn how to calculate the percent decrease in muffin sales from 80 to 64 muffins in this bakery scenario. This problem teaches percentage concepts and percent decrease formulas. Ideal for students in Grades 6-8.

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