Youd be supriced how much simple everyday things use maths and you dont even notice. When you look at the speedometer and calculate im your head how long its going to take to arrive you are doing supricingly complex math. Add how much it will use gas and how far you can get with full tank.

Same when you compare two different sized packages of the same product and try to asses which one is more bang for your buck.

Or if you are trying to calculate is it legal to drive after night out now or should you wait for an hour.

After a weekend trip with your friends when you start to tally who brought what stuff and how expensive it was and who is the vegan who did not eat the steak but brought case of wine that everybody was drinking exept Steve who was the dedicated driver. Then there was Sarah who was only one night at the rented house while everybody else was there two nights, but she bought the steaks and other meat that the rest of the crew (not counting the vegan) ate the whole weekend.

Also almost anything done with building or renovations.

More closely you understand the calculations the less it becomes math and more to just how things work. Math is funny like that.