Copy and complete the following list of equivalent fractions of $1 \over 2$.
$${1 \over 2} = {? \over 4} = {? \over 6} = {? \over 8} = {? \over 10} = {? \over 20} = {? \over 50} = {? \over 100}$$

Equivalent fractions
Equivalent fractions are fractions which mean exactly the same thing but which are written in a completely different form. In the diagram below you can see a circle split into halves and then into quarters. We can see here that one half takes up exactly the same area as two quarters. This means that if I have one half of a pizza and my friend has two quarters of a pizza, we have exactly the same amount of pizza.
Now every fraction has an infinite number of equivalent fractions, so we will not want to list them all, as this will take quite a while, but it does mean that we can always choose a convenient equivalent fraction when we need one. More of this later.
Calculations with equivalent fraction are pretty straight forward, so long as you remember this simple rule:
If you multiply or divide the numerator by a number, you must do exactly the same to the denominator, and vice versa in order to keep the same value.