What is 6/4 of 51?
Often, in mathematics or everyday life, we need to find a fraction of a given number. For instance, how would you quickly calculate 6/4 of 51? We'll show you a straightforward method to achieve that.
How to calculate 6/4 of 51?
- Multiply the whole number by the numerator of the fraction: 51 × 6 = 306
- Divide this result by denominator of the fraction: 306/4 = 76.5
- Simplify by dividing both the numerator and denominator by their GCD (2):
- 306/2 = 153
- 4/2 = 2
- Which gives: 153/2
Since 153/2 is an improper fraction, the result could also be expressed as a mixed number: 76 1/2
How does it work?
The principle behind finding a fraction of a number, such as 6/4 of 51, is rooted in the method of cross-multiplication.
Consider the following proportion: (where x represents 6/4 of 51)
- 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, 6/4 of 51 is equal to 153/2 (or 76.5 in its decimal form).