Answer:
1 - 7
2 - 5
3- 27.5
Step-by-step explanation:
Answer:

Step-by-step explanation:
1. Combine like terms
2y-7y = -5y
-5y=5
2. Divide by -5 and the answer is 
The answer is 1.12% decrease
Explanation in image
There are 3 numbers as such.
First lets list all the factors of 12
1,2,3,4,6,12
now lets see which are multiples of 3
3,6 and 12 are multiples of 3
therefore we are left with
1,2 and 4
3.2 divided by 0.4 would be 8