i tjink it is whatever the number you want times by 100 divide by 17.5% good luck.--Answer1:It depends on the country and the item..--Answer2:Well, if ur in the UK, its 15%. So whatever the price of something is multiply it by 0.15. that will give you the amount of VAT.Alternatively.... take 10% of the figure, then half it, and add it onto the figure you got for 10%...i.e. VAT for an item costing £1.50. 10% = £0.15. Plus half again = £0.15 + £0.075 (7 1/2 p), so the VAT of an item costing £1.50 is 22.5p.So total item cost including VAT is £1.72 (or £1.73).Hope that helps...--Answer3:if the sales price include vat: (Salaes price/100+vat rate)*vat rateExample: A business paid £10 petrol cost for its business car. How much can it claim vat if vat rate is 15%.[10/(100+15)]*15 =(10/115)*15 = £1.30.If the sales price exclude vat.Sales price*vat rate.