- Maria wants to buy a ring that costs $67.00. She has a coupon for 25% off. a. How much is the discount? Find the (percent, part, whole).
b. how much will the ring cost after she uses her coupon?

$16.75

Step-by-step explanation:

To get the solution, we are looking for, we need to point out what we know.

1. We assume, that the number 67 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 67 is 100%, so we can write it down as 67=100%.

4. We know, that x is 25% of the output value, so we can write it down as x=25%.

5. Now we have two simple equations:

1) 67=100%

2) x=25%

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

67/x=100%/25%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 25% of 67

67/x=100/25

(67/x)*x=(100/25)*x       - we multiply both sides of the equation by x

67=4*x       - we divide both sides of the equation by (4) to get x

67/4=x

16.75=x

x=16.75

now we have:

25% of 67=16.75

the discount is -16.75. After she uses the coupon the ring will cost $50.25 since 67-16.75= 50.25

the answer is (-4,-4)

hope this ! : d