143k views
2 votes
A CD which usually sells for $15.78 has a 15% discount. Estimate the amount of the discount.

User Davuz
by
9.3k points

2 Answers

5 votes
if we take 15.78 to be the 100%, what is the 15%?


\bf \begin{array}{ccll} amount&\%\\ \text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\ 15.78&100\\ a&15 \end{array}\implies \cfrac{15.78}{a}=\cfrac{100}{15}\implies \cfrac{15.78\cdot 15}{100}=a
User Interfector
by
8.3k points
3 votes

You need to round 15.78 to get 16. You then multiply 16 to 15 and divide by 100 to get your answer :

2.4

Which would also be $2.40

User Sergpetrov
by
9.1k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories