I wasn't sure what you meant by combined terms. But I can give you a little guidance as to where the 0.835 came from.
Convert 0.835 into percentage form. Then compare that value to the values you have in your question.
Since the question is about prices and discounts, remember that you have an original price then a discount. After the discount you wind up paying a certain percentage of the original (pre-discount) price.
I hope this helps.