At the craft store, Maura bought a bag of red and purple marbles. She received 30 marbles in all. 6 of the marbles were red. What percentage of the marbles were red?

Question

Write your answer using a percent sign (%).

Answer 1

To find the percentage of red marbles, we can use the formula for percentage:

\[ \text{Percentage of red marbles} = \left( \frac{\text{Number of red marbles}}{\text{Total number of marbles}} \right) \times 100 \]

In this case, Maura has:

• Number of red marbles = 6
• Total number of marbles = 30

Substituting these values into the formula gives:

\[ \text{Percentage of red marbles} = \left( \frac{6}{30} \right) \times 100 \]

Calculating the fraction:

\[ \frac{6}{30} = 0.2 \]

Now, multiplying by 100 to convert to percentage:

\[ 0.2 \times 100 = 20 \]

Thus, the percentage of the marbles that were red is:

\[ \boxed{20%} \]