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Rebeckah answered 42 of the 60 questions correctly on a test. Which method should she use to find the percent of questions she answered correctly?

First, subtract 42 from 60 to find the ratio of questions answered correctly to total questions, which is StartFraction 18 Over 60 EndFraction. Then, add 40 to the numerator and denominator to find the percent: StartFraction 58 Over 100 EndFraction = 58 percent.
First, find the ratio of questions answered correctly to total questions, which is StartFraction 42 Over 60 EndFraction. Then, add 40 to the numerator and denominator to find the percent: StartFraction 82 Over 100 EndFraction = 82 percent.
First, subtract 42 from 60 to find the ratio of questions answered correctly to total questions, which is mc025-5.jpg. Then, simplify the ratio to StartFraction 3 Over 10 EndFraction. Finally, multiply the numerator and denominator by 10 to find the percent: StartFraction 30 Over 100 EndFraction = 30 percent.
First, find the ratio of questions answered correctly to total questions, which is StartFraction 42 Over 60 EndFraction. Then, simplify the ratio to StartFraction 7 Over 10 EndFraction. Finally, multiply the numerator and denominator by 10 to get StartFraction 70 Over 100 EndFraction = 70 percent.

1 answer

To find the percent of questions Rebeckah answered correctly, the best method is to calculate the ratio of questions answered correctly to the total questions first, and then convert that ratio to a percentage.

  1. Start with the ratio: \(\frac{42}{60}\).
  2. To convert to a percentage, you need to calculate \(\frac{42}{60} \times 100\).

So, let's break it down step by step:

  1. Calculate the ratio: \(\frac{42}{60} = 0.7\)

  2. Convert the ratio to a percentage: \(0.7 \times 100 = 70%\)

Thus, the correct method Rebeckah should use is the fourth option provided:

First, find the ratio of questions answered correctly to total questions, which is \(\frac{42}{60}\). Then, simplify the ratio to \(\frac{7}{10}\). Finally, multiply the numerator and denominator by 10 to get \(\frac{70}{100}\) = 70 percent.

The correct answer is that Rebeckah answered 70% of the questions correctly.