A time i used math in real life is during cooking. when measuring out ingredients, some recipes are in different metric systems. this means you have to use math to convert for example ml to oz. You also need to convert the temperature of the required Celsius/ Fahrenheit. During baking, a lot of math is required.

photo from: https://www.pexels.com/photo/baking-tools-on-the-white-wooden-table-6996329/