What is 9/9 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 9/9 of 51? We'll show you a straightforward method to achieve that.
How to calculate 9/9 of 51?
- Multiply the whole number by the numerator of the fraction: 51 × 9 = 459
- Divide this result by denominator of the fraction: 459/9 = 51
- Simplify by dividing both the numerator and denominator by their GCD (9):
- 459/9 = 51
- 9/9 = 1
- Which gives: 51/1
How does it work?
The principle behind finding a fraction of a number, such as 9/9 of 51, is rooted in the method of cross-multiplication.
Consider the following proportion: (where x represents 9/9 of 51)
- Using the cross-multiplication method, multiply both numerators by their opposite denominators:
- Which gives:
- Divide both sides by 9 to isolate x:
- Which gives the result: (or )
Thus, 9/9 of 51 is equal to 51/1 (or 51 in its decimal form).