What is 2/4 of 47?
Often, in mathematics or everyday life, we need to find a fraction of a given number. For instance, how would you quickly calculate 2/4 of 47? We'll show you a straightforward method to achieve that.
How to calculate 2/4 of 47?
- Multiply the whole number by the numerator of the fraction: 47 × 2 = 94
- Divide this result by denominator of the fraction: 94/4 = 23.5
- Simplify by dividing both the numerator and denominator by their GCD (2):
- 94/2 = 47
- 4/2 = 2
- Which gives: 47/2
Since 47/2 is an improper fraction, the result could also be expressed as a mixed number: 23 1/2
How does it work?
The principle behind finding a fraction of a number, such as 2/4 of 47, is rooted in the method of cross-multiplication.
Consider the following proportion: (where x represents 2/4 of 47)
- Using the cross-multiplication method, multiply both numerators by their opposite denominators:
- Which gives:
- Divide both sides by 4 to isolate x:
- Which gives the result: (or )
Thus, 2/4 of 47 is equal to 47/2 (or 23.5 in its decimal form).