Question

The value of $\frac{3}{4}-\frac{5}{7}$ is _____.

• A. $\frac{3}{17}$
• B. $\frac{5}{28}$
• C. $\frac{1}{7}$
• D. $\frac{1}{28}$

Answer 1

The correct option is D $\frac{1}{28}$

We can only subtract two fractions when they share the same denominator.
We can do this in the following way:

$\therefore \frac{3}{4}-\frac{5}{7}=\frac{21-20}{28}$
$=\frac{1}{28}$