**Lesson of the Week: Exploring Percent Known or Unknown Total?**

Read the question carefully.

Annotate.

Decide if the total is known or unknown.

Known total? Go back to last week's lesson (IMN page 20, options 1 -4).

Unknown total? Follow these steps to set up your model.

Paige was assigned some math problems for homework. She solved the first 32 problems before dinner. She solved the last 20% of the assignment after dinner. How many math problems was Paige assigned?

We do not know a total.

Step 1: Draw a bar and label the given information.

Read the question carefully.

Annotate.

Decide if the total is known or unknown.

Known total? Go back to last week's lesson (IMN page 20, options 1 -4).

Unknown total? Follow these steps to set up your model.

Paige was assigned some math problems for homework. She solved the first 32 problems before dinner. She solved the last 20% of the assignment after dinner. How many math problems was Paige assigned?

We do not know a total.

Step 1: Draw a bar and label the given information.

**Step 2: Divide the known part (or term) by the number of unit boxes included in the bracket. In this case, we know 32 problems are represented by 4 unit boxes.**

32 divided by 4 = 8, therefore, each 20% unit box represents 8 homework problems.

32 divided by 4 = 8, therefore, each 20% unit box represents 8 homework problems.

**Step 3: Answer the ultimate question; determine the total number of homework problems.**

Since each 20% unit box represents 8 problems, there are 40 total homework problems assigned to Paige.

Since each 20% unit box represents 8 problems, there are 40 total homework problems assigned to Paige.

**Since 8 x 5 = 40 or 32 + 8 = 40, we have determined the total number of problems assigned to Paige equals 40.**

**Are you able to prove this answer using a different strategy? Give it a try......**