What is 2/7 of 4?
Often, in mathematics or everyday life, we need to find a fraction of a given number. For instance, how would you quickly calculate 2/7 of 4? We'll show you a straightforward method to achieve that.
How to calculate 2/7 of 4?
- Multiply the whole number by the numerator of the fraction: 4 × 2 = 8
- Divide this result by denominator of the fraction: 8/7 = 1.1428571428571
Since 8/7 is an improper fraction, the result could also be expressed as a mixed number: 1 1/7
How does it work?
The principle behind finding a fraction of a number, such as 2/7 of 4, is rooted in the method of cross-multiplication.
Consider the following proportion: (where x represents 2/7 of 4)
- Using the cross-multiplication method, multiply both numerators by their opposite denominators:
- Which gives:
- Divide both sides by 7 to isolate x:
- Which gives the result:
Thus, 2/7 of 4 is equal to 8/7 (or 1.1428571428571 in its decimal form).