Mark buys a computer. A VAT of 10% is added to the price of the computer. He pays £246. What was the original price of the computer before VAT was added?

We want to find the original price of the computer.We know when 10% of the price was added to the computer it costs £264.So £264 is equal to the original price plus 10% of the original price.To find 10% of a number, we multiply it by 0.10, and to find 100% we multiply it by 1.So £246 equals 1 times the original price plus 0.1 times the original price.1+0.1=1.1So we get £246=1.1 x the original price.We divide both sides by 1.1 to cancel out the multiple of 1.1 next to the original price.So we find the original price = £246/1.1=240