Question

Tony took a math quiz last week. There were 80 problems on the quiz and Tony answered 70% of them correctly. How many problems did Tony get correct?

Answer: 56


(not a question but just trying to help) :)

Answer 1

The correct answer is 56.

Explanation:

We are given that there were 80 problems on the quiz and Tony answered 70% of them correctly.

We are are to find the number of problems Tony get correct.

Problems Tony got correct =
`\frac { 7 0 } { 1 0 0 } * 8 0` = 56

Therefore, Tony got 56 problems right out of 80 on his math quiz.

Answer 2

56 problems

Explanation:

So we already know that the answer is: 56. However, a good help is knowing how to obtain this answer from the data provided.

Tony's quiz had 80 questions

Tony correctly answered 70% of them.

We can always write a percentage amount as a ratio by dividing the amount by 100.

`70\% = (70)/(100) = 0.7`.

This means that for every 100 questions, tony will respond correctly 70.

So, if Toni did a questionnaire of n questions, the amount that will answer correctly is calculated by the following expression:

`C = n*(70)/(100)`

If
`n = 80` then:

`C = 80 * (70)/(100)\\\\C = 56`