Final answer:
Bella received 6 red marbles, which is 15% of the total 40 marbles she bought at the craft store.
Step-by-step explanation:
During her craft store visit, Bella acquired a total of 40 marbles, a mix of red and green.
To calculate the number of red marbles Bella received, we need to find 15% of the total marbles, which is 40. The calculation steps are as follows:
Convert the percentage to a decimal: 15% equals 0.15 when converted to decimal form.
Multiply the total number of marbles by the decimal: 0.15 multiplied by 40 equals 6.
Therefore, Bella received 6 red marbles.