



 
Hi Conor, I bought a high end TV. I got 15% off but it still cost £510. Thus the original price was divided into two parts, the reduction, 15% and what it cost me £510. Since the reduction was 15% of the original price, what I paid must be 100%  15% = 85% of the original price. Thus
That is
Thus
I hope this helps,  


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