5/21dvide 15/7
5/21 * 7/15
= 5/(3*7) * 7/(3*5)
= 1/9
To divide fractions, you need to multiply the first fraction by the reciprocal of the second fraction.
1. Let's start by calculating the reciprocal of 15/7. To find the reciprocal, you simply swap the numerator and the denominator. So the reciprocal of 15/7 is 7/15.
2. Now, we can multiply the first fraction 5/21 with the reciprocal of 15/7, which is 7/15.
(5/21) * (7/15)
3. To multiply fractions, you multiply the numerators together and the denominators together.
Numerator: 5 * 7 = 35
Denominator: 21 * 15 = 315
4. So the final result of the division 5/21 divided by 15/7 is:
35/315
5. You can simplify this fraction by dividing both the numerator and denominator by the greatest common divisor (GCD). In this case, the GCD of 35 and 315 is 35.
Dividing both 35 and 315 by 35, we get:
35/315 = 1/9
Therefore, 5/21 divided by 15/7 is equal to 1/9.