Question

The students in Naomi’s class earned 20% of the selling price of each calendar sold this year and last year.
- At last year’s selling price, Naomi’s class sold 650 calendars.
- At this year’s selling price, Naomi’s class sold 600 calendars.

2. Which year did Naomi's class make more money and by how much?

Answer 1

I think there might be missing information. That being said, for each year, multiply (selling price)(# of calendars sold) to get the total revenue. multiply each total by 20% since the class gets a 20% cut each year. then simply see which year produes more income for the class.

for part 2, simply subtract the two results