How people use math in money?

Answer 1

Money is a quantified unit of dollars and cents, or whatever currency that is in use in your country. Math is used at the following places:

Stores:

The computer tallies the total amount of the prices of the items that you buy. You hand over money and get change back..

Banks:

Deposits, withdrawals, and interest rates require math to calculate.

Stock Market:

The price of stocks, as well as other parameters for a publicly traded company is based on some very complicated mathematical models

Business (in general):

Revenue - costs = profit is pretty simple, but costs can be complicated to figure out. You have production costs, materials cost (if applicable), labor cost + benefits cost for those employees, facilities (lease, rent), electricity, etc...

Employee Paycheck:

In the United States, we have something called an income tax where a portion of one's income is taxed at a certain percentage based on how much one makes. There are federal and state income taxes, social security taxes, medicare, disability, healthcare contributions, etc.

All of these require math to calculate. The biggest thing to remember is when money is involved, there is no limit to the amount of math that can be used to keep that money.