What is 4/7 of 7?
Often, in mathematics or everyday life, we need to find a fraction of a given number. For instance, how would you quickly calculate 4/7 of 7? We'll show you a straightforward method to achieve that.
How to calculate 4/7 of 7?
- Multiply the whole number by the numerator of the fraction: 7 × 4 = 28
- Divide this result by denominator of the fraction: 28/7 = 4
- Simplify by dividing both the numerator and denominator by their GCD (7):
- 28/7 = 4
- 7/7 = 1
- Which gives: 4/1
How does it work?
The principle behind finding a fraction of a number, such as 4/7 of 7, is rooted in the method of cross-multiplication.
Consider the following proportion: (where x represents 4/7 of 7)
- 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: (or )
Thus, 4/7 of 7 is equal to 4/1 (or 4 in its decimal form).