21/15 Simplified
What is 21/15 Simplified?
7/5 is the simplified fraction of 21/15.
Since the numerator [21] is greater than the denominator [15] of the fraction (it's called an improper fraction), so we can convert it into a mixed fraction with a whole number:
Simplifying Fraction 21/15 using GCF
The first way to simplify the fraction 21/15 is to use the Greatest Common Factor (GCF) of our numerator [21] and denominator [15].
GCF of 21 and 15 is 3
And then divide both the numerator [21] and denominator [15] by the GCF [3].
Simplifying Fraction 21/15 using Prime Factors
Another method to reduce the fraction 21/15 to its simplest form is to use the Prime Factors of numerator [21] and denominator [15].
Prime Factors of 21: 3,7
Prime Factors of 15: 3,5
Now we can write down a new fraction expressed by its Prime Factors and cancel common factors in numerator and denominator:
Simplifying Fraction 21/15 by Dividing by the Smallest Possible Number
In order to simplify our fraction we can start dividing both the numerator [21] and denominator [15] by the smallest possible number (2,3,4,5... and so on), and repeat this until it is impossible to divide without a reminder.
Related Calculations
<a href="https://calculat.io/en/number/fraction-simplified/21--15">What is 21/15 Simplified to Simplest Form? - Calculatio</a>