Math Is Fun Forum

Hey all,

I'm not very good at maths but help me out, will ya?

Ok, here is the scenario:

The total value of the car is £100, so what is 10%?

ok...thats £10, so new valueis £90, from that...how do you get back to the full amount via percentages.

I would say, ohh its 90% of the total price...so add 10%, right? so this is:

10% of 90 which £9, so the new value is £99, that is incorrect.

How do i do it via percentages. I'm meant to know this for vat purposes,  i know in answer it, in the forumla it would be like times 100.2 etc.

please help!