What is 3/6 of 77?
Often, in mathematics or everyday life, we need to find a fraction of a given number. For instance, how would you quickly calculate 3/6 of 77? We'll show you a straightforward method to achieve that.
How to calculate 3/6 of 77?
- Multiply the whole number by the numerator of the fraction: 77 × 3 = 231
- Divide this result by denominator of the fraction: 231/6 = 38.5
- Simplify by dividing both the numerator and denominator by their GCD (3):
- 231/3 = 77
- 6/3 = 2
- Which gives: 77/2
Since 77/2 is an improper fraction, the result could also be expressed as a mixed number: 38 1/2
How does it work?
The principle behind finding a fraction of a number, such as 3/6 of 77, is rooted in the method of cross-multiplication.
Consider the following proportion: (where x represents 3/6 of 77)
- Using the cross-multiplication method, multiply both numerators by their opposite denominators:
- Which gives:
- Divide both sides by 6 to isolate x:
- Which gives the result: (or )
Thus, 3/6 of 77 is equal to 77/2 (or 38.5 in its decimal form).