Multiply top and bottom by the same number to get a new fraction which is equivalent to the original fraction.
We can repeat this for any real number, eg 5 and 10,
But why can we do this? If you look at all the multiplying factors you will see that each one is a number divided by itself:
So three equivalent fractions are
It should be noted that there are in fact an infinite number of equivalent fractions which can be found like this.