# You are reading our best questions and answers in the math category

The metric system is an international system of measurement used in all the countries of the world, except for the United States, Burma and Liberia. It was designed to be a universal system that could easily be used by ordinary people. It is a decimal system that is designed to make complex conversions between units, such as conversion between inches and yards, obsolete. If you want to know who developed this system of measurement, continue reading to find out.

In statistics, you may have come across the term ‘mode’ or ‘modal score’. But what does this mean? How do you find the mode? This post will answer those questions and give you some examples of how to calculate the mode.

In math, a percentage is a way of writing a number as a fraction of 100 (per cent means per hundred). For example, if you hear that 40% of people have a pet this means that 40 out of 100 people own a pet. Many people ask ‘how do you calculate percentages’? This post will answer that question and give you a few examples to help you along.

If you have done statistics in math you may have come across the term ‘median’. But what is the median? How do you calculate the median? This post will tell you how to find the median through a step-by-step process. There are 2 examples at the bottom of the post.