deltagal,
It seems like it should be easy, however it isn't! There is some serious thinking going on with this one.
Think 1/5 = 1 part. Since 3/5 of the tarts were sold in the morning, 3 parts of 5 were sold in the morning. Draw a bar with 5 equal parts.
Now, 1/4 of the remaining 2 parts were sold in the afternoon. Divide the final 2 bars into 4 parts to show 1/4 of the final two parts that were sold in the afternoon.
Now, to compare afternoon to morning, divide the other 3 bars into half (like the final two bars), making 10 bars total.
Next, think 6 parts were sold in the morning (3/5 = 6/10) and 1 part was sold in the afternoon. Comparing the 6 parts sold in the morning to the 1 part sold in the afternoon, 5 more parts were sold in the morning than in the afternoon. Those 5 parts were 200 more total tarts than those sold in the afternoon. So, divide 200 by 5 parts to find that each of the 5 parts = 40 tarts each.
Now, with each of the 10 parts in the total number of tarts being worth 40, all of the tarts totaled together would be 400.
I had to work on that one awhile myself this afternoon. Hope that helps!
If you don't happen to have the Home Instructor's guide for 5A/5B, you may wish to consider it. We do highly recommend them for reference only at levels 5A and above, and they're on our website. Just a thought if you run into more challenges.
Blessings,
Carrie