Answer:David has a total of 63 fliers to post around town. Last week, he posted 1/3 of the fliers, which means he posted (1/3) * 63 = 21 fliers.
This week, he posted 2/7 of the fliers. To calculate how many fliers he posted this week, we can use the formula (2/7) * 63 = 18.
Therefore, David has posted a total of 21 + 18 = 39 fliers so far.
To find out how many fliers he has left to post, we can subtract the number of fliers he posted from the total number of fliers. So, 63 - 39 = 24 fliers are left for him to post.
In summary:
- Last week, David posted 21 fliers.
- This week, David posted 18 fliers.
- David has 24 fliers left to post.
Explanation: