Brad and his mom went out for lunch and the bill came to $25.45. His mom wanted to leave a 18% tip. This means that the amount of the tip that she wanted to leave is 18% of the bill that came. Therefore
Amount of tip = 18/100 × the bill that came.
Amount of tip = 0.18×25.45= $4.581
So they would leave a tip of $4.581
behind.
The total bill would be sum of the original bill + sum of the amount of tip that they want to leave behind. Therefore, it becomes
