Answer:
Step-by-step explanation:
I assume you need help with the first picture:
Let 
Then

Clearly you can see that the sum of 2 rational numbers gives a rational number.
Answer:
1.5/3
Step-by-step explanation:
Answer is in the file below
tinyurl.com/wpazsebu
Step 1) you should put 8 to fill in the blacks
step2) It is 300
step3)167.467
For this, you would need to find 70% of 140. To do so you must do the following: 140 x 0.7, which would lead you to the following answer: 98. So, if someone were to weigh 140 pounds, they would have around 98 pounds of water in their body!
I hope this was helpful, and if you need any more help, please let me know so I can further assist you.