What is 6/1 of 21?
Often, in mathematics or everyday life, we need to find a fraction of a given number. For instance, how would you quickly calculate 6/1 of 21? We'll show you a straightforward method to achieve that.
How to calculate 6/1 of 21?
- Multiply the whole number by the numerator of the fraction: 21 × 6 = 126
- Divide this result by denominator of the fraction: 126/1 = 126
How does it work?
The principle behind finding a fraction of a number, such as 6/1 of 21, is rooted in the method of cross-multiplication.
Consider the following proportion: (where x represents 6/1 of 21)
- Using the cross-multiplication method, multiply both numerators by their opposite denominators:
- Which gives:
- Divide both sides by 1 to isolate x:
- Which gives the result:
Thus, 6/1 of 21 is equal to 126/1 (or 126 in its decimal form).