What is 1/5 of 43?
Often, in mathematics or everyday life, we need to find a fraction of a given number. For instance, how would you quickly calculate 1/5 of 43? We'll show you a straightforward method to achieve that.
How to calculate 1/5 of 43?
- Multiply the whole number by the numerator of the fraction: 43 × 1 = 43
- Divide this result by denominator of the fraction: 43/5 = 8.6
Since 43/5 is an improper fraction, the result could also be expressed as a mixed number: 8 3/5
How does it work?
The principle behind finding a fraction of a number, such as 1/5 of 43, is rooted in the method of cross-multiplication.
Consider the following proportion: (where x represents 1/5 of 43)
- Using the cross-multiplication method, multiply both numerators by their opposite denominators:
- Which gives:
- Divide both sides by 5 to isolate x:
- Which gives the result:
Thus, 1/5 of 43 is equal to 43/5 (or 8.6 in its decimal form).