Answer:
0
Step-by-step explanation:
Step 1: Make common denominators
What is the LCM of 21 and 7: 7
So, we need to convert both fractions into a 21 denominator.
15/21 * 1/1 = 15/21
5/7 * 3/3 = 15/21
Step 2: Subtract the numbers
15/21 - 5/7 is same as 15/21 - 15/21
15/21 - 15/21
0
Answer: 0
