Since we are dealing with a real life situation, it’s totally acceptable to round the amount to $45, an easy number to split in thirds. Also, you can either calculate the tip before you split the bill, or after you split it. Either way, you’ll get the same answer. Split Before You Tip: | Tip Before You Split: | each
| 
| Now, find 20% of $15 and add that as a tip. | The total bill comes to | 
| 
| So, each of you owe | Splitting that in thirds means each will pay: | 
| 
|
| |