The fraction 15/21 simplified as a fraction is equal to 5/7. In this post, we will learn how to simplify the fraction 15/21 (15 divided by 21) in its simplest form, that is, we will reduce the fraction 15/21 to the lowest terms.

**Question: What is the simplified form of 15/21?**

Answer: The simplified form of 15/21 is 5/7. |

**Solution:**

For $\dfrac{15}{21}$, the numerator is 15 and the denominator is 21.

**Step 1:**

First, we will find the greatest common divisor (GCD) of the numerator and the denominator, that is, we will find

GCD (15, 21).

**Step 2:**

- Divisors of 15 are 1, 3, 5, and 15.
- Divisors of 21 are 1, 3, 7, and 21.

From above we see that 3 is the highest number that divides both 15 and 21. Thus, we can conclude

GCD (15, 21) = 3.

**Step 3:**

Divide both the numerator and the denominator by GCD (15, 21) = 3. By doing so, we get that

$\dfrac{15}{21}=\dfrac{15 \div 3}{21 \div 3}$

= $\dfrac{5}{7}$.

Thus, 5/7 is the simplest reduced form of 15/21.

Remark: We have reduced the fraction 15/21 in its lowest terms to 5/7. Note that 5/7 is an equivalent fraction of 15/21.

**Video Solution of 15/21 Simplified:**

**ALSO READ:**

14/21 Simplified: 14/21 simplified to lowest terms is 2/3.

## FAQs

**Q1: What is the simplified lowest form of 15/21?**

Answer: 15/21 simplified to lowest terms is 5/7.

**Q2: Write an equivalent fraction of 15/21.**

Answer: 5/7 is an equivalent fraction of 15/21.