Bob's Gift Shop sold 800 cards for Mother's Day. One salesman, Luis, sold 20% of the cards sold for Mother's Day. How many cards did Luis sell?

1. ### Break Down the Problem

To find out how many cards Luis sold, we need to calculate 20% of the total cards sold for Mother's Day, which is 800 cards.

2. ### Relevant Concepts

To calculate a percentage, we can use the formula: $\text{Amount} = \left(\frac{\text{Percentage}}{100}\right) \times \text{Total}$ Here, Percentage = 20 and Total = 800.

3. ### Analysis and Detail

Plugging the values into the formula: $\text{Amount} = \left(\frac{20}{100}\right) \times 800$ $\text{Amount} = 0.2 \times 800$ $\text{Amount} = 160$ So, Luis sold 160 cards.

4. ### Verify and Summarize

We check the calculation: $\text{Total cards sold} = 800, \quad \text{Percentage sold by Luis} = 20\%$ Calculate: $20\% \text{ of } 800 = 160$ The calculations are correct.

Final Answer

Luis sold 160 cards for Mother's Day.