Answer:
Blank = 2/7
Step-by-step explanation:
21 V³ 15- 9V³15
= (21-9)V³15
= 12V³15
First, flip 1 of the fractions and multiply like you normally would with fractions.
Ex.
1/3 divided by 1/4.
Flip 1/4 so it is now 4/1
Multiply 1/3 and 4/1
The answer is 4/3
15, 30, 45
Hope this helps.