What is 9/7 of 10?
Often, in mathematics or everyday life, we need to find a fraction of a given number. For instance, how would you quickly calculate 9/7 of 10? We'll show you a straightforward method to achieve that.
How to calculate 9/7 of 10?
- Multiply the whole number by the numerator of the fraction: 10 × 9 = 90
- Divide this result by denominator of the fraction: 90/7 = 12.857142857143
Since 90/7 is an improper fraction, the result could also be expressed as a mixed number: 12 6/7
How does it work?
The principle behind finding a fraction of a number, such as 9/7 of 10, is rooted in the method of cross-multiplication.
Consider the following proportion: (where x represents 9/7 of 10)
- 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, 9/7 of 10 is equal to 90/7 (or 12.857142857143 in its decimal form).