Question

A book you want to buy usually costs b dollars. It is on sale for 15% off the original

price. This means that the price, b, is reduced by 0.15b.
The expression representing this situation is b-0.15b.
Rewrite this expression to combine like terms.
O A. -0.85b
OB. 85b
O C. 0.85b
O D. 1.15b
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Answer 1

Answer: C) 0.85b

This is saying 85% of b since 100% - 15% = 85%

You can think of b-0.15b as 1b-0.15b = (1-0.15)b = 0.85b