- Multiply and Divide Fractions
- Home
- Product of a Unit Fraction and a Whole Number
- Product of a Fraction and a Whole Number: Problem Type 1
- Introduction to Fraction Multiplication
- Fraction Multiplication
- Product of a Fraction and a Whole Number Problem Type 2
- Determining if a Quantity is Increased or Decreased When Multiplied by a Fraction
- Modeling Multiplication of Proper Fractions
- Multiplication of 3 Fractions
- Word Problem Involving Fractions and Multiplication
- The Reciprocal of a Number
- Division Involving a Whole Number and a Fraction
- Fraction Division
- Fact Families for Multiplication and Division of Fractions
- Modeling Division of a Whole Number by a Fraction
- Word Problem Involving Fractions and Division

# Modeling Multiplication of Proper Fractions

Let’s use an area model to multiply fractions. The area model gives us a good picture of what happens when we multiply two fractions. We see the problem in two dimensions. We represent the height using one fraction and the width using another fraction. It is important to see this kind of connections in mathematics.

Multiply the fractions using an area model $\frac{1}{3}$ × $\frac{1}{3}$

### Solution

**Step 1:**

In this problem, we want to find $\frac{1}{3}$ of $\frac{1}{3}$

**Step 2:**

First we divide the height of a rectangle into 3 equal parts.

**Step 3:**

We shade one part to represent $\frac{1}{3}$

**Step 4:**

Next we divide the width into 3 equal parts and shade 1 part to make it $\frac{1}{3}$

**Step 5:**

Now we can figure out the product. The part where the shading overlaps represents the numerator. The total number of parts represents the denominator. There are 9 total parts and 1 of the parts overlaps.

**Step 6:**

So, the product is $\frac{1}{9}$.

$\frac{1}{3}$ × $\frac{1}{3}$ = $\frac{1}{9}$

Multiply the fractions using an area model $\frac{2}{3}$ × $\frac{1}{3}$

### Solution

**Step 1:**

In this problem, we want to find $\frac{2}{3}$ of $\frac{1}{3}$

**Step 2:**

First we divide the height of a rectangle into 3 equal parts.

**Step 3:**

We shade one part to represent $\frac{1}{3}$

**Step 4:**

Next we divide the width into 3 equal parts and shade 2 parts to make it $\frac{2}{3}$

**Step 5:**

Now we can figure out the product. The part where the shading overlaps represents the numerator. The total number of parts represents the denominator. There are 9 total parts and 2 of the parts overlaps.

**Step 6:**

So, the product is $\frac{2}{9}$.

$\frac{2}{3}$ × $\frac{1}{3}$ = $\frac{2}{9}$

Multiply the fractions using an area model $\frac{1}{2}$ × $\frac{1}{3}$

### Solution

**Step 1:**

In this problem, we want to find $\frac{1}{2}$ of $\frac{1}{3}$

**Step 2:**

First we divide the height of a rectangle into 3 equal parts.

**Step 3:**

We shade one part to represent $\frac{1}{3}$

**Step 4:**

Next we divide the width into 2 equal parts and shade 1 part to make it $\frac{1}{2}$

**Step 5:**

Now we can figure out the product. The part where the shading overlaps represents the numerator. The total number of parts represents the denominator. There are 6 total parts and 1 of the parts overlaps.

**Step 6:**

So, the product is $\frac{1}{6}$.

$\frac{1}{2}$ × $\frac{1}{3}$ = $\frac{1}{6}$