How to subtract fractions - SSAT Upper Level Quantitative

Card 0 of 40

Janice had $\frac{3}{4}$ of a cup of milk. If she used $\frac{1}{12}$ cup to make some scrambled eggs, how much of a cup of milk does she have left?

Tap to see back →

Subtract the two fractions. To subtract them, they must have a common denominator. Multiply the numerator and denominator of $\frac{3}{4}$ by to create a common denominator of , then subtract the numerators and reduce the resulting fraction.

$\frac{3}{4}$-$\frac{1}{12}$=\frac{9}{12}$-$\frac{1}{12}$=\frac{8}{12}$=\frac{2}{3}$

What is the result of this operation?

$$\frac{3}{4}$-$\frac{1}{4}$=?$

Tap to see back →

Since the denominators are exactly the same, we can just subtract the tops.

So

$\frac{3}{4}$-$\frac{1}{4}$=\frac{2}{4}$

By reducing we get

$\frac{1}{2}$

What is the result of this operation?

$$\frac{2}{7}$-$\frac{1}{7}$=?$

Tap to see back →

Since the denominators are the same, we can just subtract the numerators.

So

$\frac{2}{7}$-$\frac{1}{7}$=\frac{1}{7}$

What is the result of this operation?

$$\frac{4}{9}$-$\frac{1}{9}$=?$

Tap to see back →

Since the denominators are the same, we can just subtract the numerators.

$\frac{4}{9}$-$\frac{1}{9}$=\frac{3}{9}$

By reducing our result, we get

$\frac{1}{3}$

What is the result of this operation?

$$\frac{2}{9}$-$\frac{2}{9}$=?$

Tap to see back →

Since the denominators are the same, we can just subtract the numerators.

$\frac{2}{9}$-$\frac{2}{9}$=\frac{0}{9}$

The result can just be reduced to

What is the result of this operation?

$$\frac{1}{6}$-$\frac{1}{3}$=?$

Tap to see back →

Since the denominators are different, we need to transform them into the same denominator.

So

$$\frac{1}{6}$-$\frac{1}{3}$=?$

becomes

$$\frac{1}{6}$-$\frac{12}{32}$=?$

$$\frac{1}{6}$-$\frac{2}{6}$=?$

Now subtract the numerators

$\frac{1}{6}$-$\frac{2}{6}$=\frac{-1}{6}$

What is the result of the operation

$$\frac{4}{5}$-$\frac{3}{5}$=?$

Tap to see back →

Since the denominators are the exact same, we can just subtract the numerators.

$\frac{4}{5}$-$\frac{3}{5}$=\frac{1}{5}$

What is the result of this operation

$$\frac{4}{13}$-$\frac{2}{13}$=?$

Tap to see back →

Since the denominators are the exact same, we can just subtract the numerators.

$\frac{4}{13}$-$\frac{2}{13}$=\frac{2}{13}$

What is the result of this operation

$$\frac{6}{6}$-$\frac{3}{6}$=?$

Tap to see back →

Since the denominators are the same, we can just subtract the numerators.

$\frac{6}{6}$-$\frac{3}{6}$=\frac{3}{6}$

which we can reduce to

$\frac{1}{2}$

What is the result of this operation

$$\frac{2}{7}$-$\frac{3}{7}$=?$

Tap to see back →

Since the denominators are the same, we can just subtract the numerators.

$\frac{2}{7}$-$\frac{3}{7}$=\frac{-1}{7}$

Janice had $\frac{3}{4}$ of a cup of milk. If she used $\frac{1}{12}$ cup to make some scrambled eggs, how much of a cup of milk does she have left?

Tap to see back →

Subtract the two fractions. To subtract them, they must have a common denominator. Multiply the numerator and denominator of $\frac{3}{4}$ by to create a common denominator of , then subtract the numerators and reduce the resulting fraction.

$\frac{3}{4}$-$\frac{1}{12}$=\frac{9}{12}$-$\frac{1}{12}$=\frac{8}{12}$=\frac{2}{3}$

What is the result of this operation?

$$\frac{3}{4}$-$\frac{1}{4}$=?$

Tap to see back →

Since the denominators are exactly the same, we can just subtract the tops.

So

$\frac{3}{4}$-$\frac{1}{4}$=\frac{2}{4}$

By reducing we get

$\frac{1}{2}$

What is the result of this operation?

$$\frac{2}{7}$-$\frac{1}{7}$=?$

Tap to see back →

Since the denominators are the same, we can just subtract the numerators.

So

$\frac{2}{7}$-$\frac{1}{7}$=\frac{1}{7}$

What is the result of this operation?

$$\frac{4}{9}$-$\frac{1}{9}$=?$

Tap to see back →

Since the denominators are the same, we can just subtract the numerators.

$\frac{4}{9}$-$\frac{1}{9}$=\frac{3}{9}$

By reducing our result, we get

$\frac{1}{3}$

What is the result of this operation?

$$\frac{2}{9}$-$\frac{2}{9}$=?$

Tap to see back →

Since the denominators are the same, we can just subtract the numerators.

$\frac{2}{9}$-$\frac{2}{9}$=\frac{0}{9}$

The result can just be reduced to

What is the result of this operation?

$$\frac{1}{6}$-$\frac{1}{3}$=?$

Tap to see back →

Since the denominators are different, we need to transform them into the same denominator.

So

$$\frac{1}{6}$-$\frac{1}{3}$=?$

becomes

$$\frac{1}{6}$-$\frac{12}{32}$=?$

$$\frac{1}{6}$-$\frac{2}{6}$=?$

Now subtract the numerators

$\frac{1}{6}$-$\frac{2}{6}$=\frac{-1}{6}$

What is the result of the operation

$$\frac{4}{5}$-$\frac{3}{5}$=?$

Tap to see back →

Since the denominators are the exact same, we can just subtract the numerators.

$\frac{4}{5}$-$\frac{3}{5}$=\frac{1}{5}$

What is the result of this operation

$$\frac{4}{13}$-$\frac{2}{13}$=?$

Tap to see back →

Since the denominators are the exact same, we can just subtract the numerators.

$\frac{4}{13}$-$\frac{2}{13}$=\frac{2}{13}$

What is the result of this operation

$$\frac{6}{6}$-$\frac{3}{6}$=?$

Tap to see back →

Since the denominators are the same, we can just subtract the numerators.

$\frac{6}{6}$-$\frac{3}{6}$=\frac{3}{6}$

which we can reduce to

$\frac{1}{2}$

What is the result of this operation

$$\frac{2}{7}$-$\frac{3}{7}$=?$

Tap to see back →

Since the denominators are the same, we can just subtract the numerators.

$\frac{2}{7}$-$\frac{3}{7}$=\frac{-1}{7}$