If 2/5 of a number is 8, what is the number?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Excel in the CXC CSEC Mathematics Exam. Prepare with comprehensive quizzes featuring multiple choice questions, accessible hints, and explanations. Boost your confidence and knowledge!

Multiple Choice

If 2/5 of a number is 8, what is the number?

Explanation:
To find the number when given that \(\frac{2}{5}\) of it equals 8, we set up the equation: \[ \frac{2}{5} \times x = 8 \] Here, \(x\) represents the number we are looking for. To isolate \(x\), we begin by multiplying both sides of the equation by 5 to eliminate the fraction: \[ 2x = 8 \times 5 \] Calculating the right side, we find: \[ 2x = 40 \] Next, to solve for \(x\), we divide both sides by 2: \[ x = \frac{40}{2} = 20 \] Thus, the number is 20. This confirms that when you take \(\frac{2}{5}\) of 20, you do indeed get 8, since: \[ \frac{2}{5} \times 20 = 8 \] This supports that the number we were trying to find is 20, making it the correct answer among the options provided.

To find the number when given that (\frac{2}{5}) of it equals 8, we set up the equation:

[

\frac{2}{5} \times x = 8

]

Here, (x) represents the number we are looking for. To isolate (x), we begin by multiplying both sides of the equation by 5 to eliminate the fraction:

[

2x = 8 \times 5

]

Calculating the right side, we find:

[

2x = 40

]

Next, to solve for (x), we divide both sides by 2:

[

x = \frac{40}{2} = 20

]

Thus, the number is 20. This confirms that when you take (\frac{2}{5}) of 20, you do indeed get 8, since:

[

\frac{2}{5} \times 20 = 8

]

This supports that the number we were trying to find is 20, making it the correct answer among the options provided.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy