Answer:
She saved $7.5 using coupon
Explanation:
The bill of restaurant is $ 50
We are given that Natalia wants to tip the server 20% of the original bill
So, Amount of tip =
![20\% * 50](https://img.qammunity.org/2021/formulas/mathematics/middle-school/9zmji919vkjq9cnwg0pyx4xlc86a0q90pa.png)
Amount of tip =
![(20)/(100) * 50](https://img.qammunity.org/2021/formulas/mathematics/middle-school/xrv9i2b46ssut0yj4z8ali56j0x107pix4.png)
Amount of tip = 10
So, Total amount = 50+10=$60
We are also given that she has a 15% off coupon
So, Amount saved using coupon =
![15\% (50)=0.15(50)=7.5](https://img.qammunity.org/2021/formulas/mathematics/middle-school/fvo0t0uf85ygjw9h3pxnuo3brszihtqa5s.png)
So, she saved $7.5 using coupon