#### Explanation:

1. Figure out what 15% of 125 is. To do this, multiply 0.15 and 125 together. The answer should be 18.75. This is the price of the tip only.
2. Use addition to solve the problem. Add 125, which is the price of the haircut, with 18.75, which is the price of the tip. The answer should be 143.75. Therefore, Mrs. Margul paid \$143.75 in total, including tips.