I think it's B. Why?
7 equals 5 plus 2. 2 is 1 plus 1
So we need to find 1 percent and 5 percent
Now, 5 is half of 10, so we need to find 10 percent and divide it by two.
$172 divided by 10 is $17.20. 17.20 divided by 2 is $8.60
$8.60 s our 5 percent.
But we need to find 1 percent.
To get 1 percent from our 10 percent, we need to move our decimal a number to the left. So it would be $1.72 . And we need to find 2 percent. So we could either add 1.72 by itself or multiply it by two, which would be $3.44.
But like I said, we need 7 percent, so we add the 5 percent ($8.60) and 2 percent ($3.44) . The sum would be $12.04, which is B.
There :)
