The answer is definately A
Answer:A
Step-by-step explanation:
33 percent.
7/21 = 0.3333333
First you need to find the common denominator. Think of a number that both 2 and 5 can go in to evenly. 10 is the best number, so, make both denominators 10. What you do to the bottom, you must do to the top.
Now your equation is 5/10-2/10
Your answer is 3/10
