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

Answer:

56 problems

Step-by-step 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.

$70\% = \frac{70}{100} = 0.7$.

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:

$C = n*\frac{70}{100}$

If $n = 80$ then:

$C = 80 * \frac{70}{100}\\\\C = 56$

Answer 2

Answer:

The correct answer is 56.

Step-by-step 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 = $\frac { 7 0 } { 1 0 0 } \times 8 0$ = 56

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