Answer:

Step-by-step explanation:
The given rational equation is

The Least Common Denominator is

Multiply each term by the LCD.

Simplify;


Expand;

Group similar terms;


Divide by -8.

Answer:
the red one
Step-by-step explanation:
3 3/5 * 5/7
Convert the mixed number into a improper fraction.
18/5 * 5/7
Multiply the numerator(18) by the other numerator(5) while multiplying the denominator(5) by the other denominator(7).
Final Answer: 90/35 or about 2.6 *Both answers are equivalent to each other.
Answer:
Finding the missing number is fairly simple and can be done in a few short steps. I will show you using the 21 / __ fraction.
First, divide the included number by its corresponding number in the original fraction.
21 ÷ 3 = 7
To find what the denominator of this would be, multiply 4 by 7.
4 * 7 = 28
The fraction would be 21 / 28.
This works with both numerators and denominators. If you need more of the answers just ask in the comments.