UK Secondary (7-11)
LCD with rational expressions

## Interactive practice questions

Find the lowest common denominator for this pair of algebraic fractions:

$\frac{s}{3}$s3 and $\frac{s}{9}$s9

Easy
Less than a minute

Find the lowest common denominator for this pair of algebraic fractions:

$\frac{a}{2}$a2 and $\frac{b}{3}$b3

In an upcoming election, it is anticipated that the number of men who vote, $x$x, will be greater than the number of women who vote, $y$y.

Each expression below represents the expected number of people who will NOT vote in two different counties.

Find the lowest common denominator for this pair of algebraic fractions:

$\frac{1}{18h}$118h and $\frac{1}{9h}$19h