What is 3/7 of 25?
Often, in mathematics or everyday life, we need to find a fraction of a given number. For instance, how would you quickly calculate 3/7 of 25? We'll show you a straightforward method to achieve that.
How to calculate 3/7 of 25?
- Multiply the whole number by the numerator of the fraction: 25 × 3 = 75
- Divide this result by denominator of the fraction: 75/7 = 10.714285714286
Since 75/7 is an improper fraction, the result could also be expressed as a mixed number: 10 5/7
How does it work?
The principle behind finding a fraction of a number, such as 3/7 of 25, is rooted in the method of cross-multiplication.
Consider the following proportion: (where x represents 3/7 of 25)
- 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, 3/7 of 25 is equal to 75/7 (or 10.714285714286 in its decimal form).