How do I force a number to display 2 decimal places

I am trying to make a coin recognition game for children.

When a coin is dragged to the piggy bank the value of the coin is taken away from the piggy banks total.

I've got the basics working as I want but I cannot get the text to display to 2 decimal places.

For example;

£2.33 displays fine but £2.30 displays as £2.3.

How can i get the text to always show 2 decimal places?

Here is the cap.x of where i've got up to so far:

https://dl.dropboxusercontent.com/u/155402113/piggy_bank.capx

Matt

https://www.scirra.com/tutorials/179/de ... in-a-float

Thank you GamerGon for pointing me in the right direction.

I actually found this tutorial:

To be more suitable for what i was trying to achieve.

No problem, good luck mattdaly!