To add fractions.
Cutting pies and cakes to serve or measuring the ingredients to make them.
Fractions are real numbers.
They are all real numbers. All fractions can be expressed as percentages but not all percentages can be represented as fractions.
Fractions can be real, imaginary, or complex. In your case, we're willing to bet that any fraction that you've ever encountered so far has been a real number.
To add fractions.
Recipes!
You use fractions for LOTS of things in the real world like money, gambling, shopping, clothing, etc.
Whenever we are dealing with rational fractions.
The question presumes that math classes are not part of the real world, which is debatable. The GCF can be used to simplify fractions. Carpenters and chefs use fractions in practical, non-academic settings.
Use the GCF to reduce fractions. Use the LCM to add and subtract unlike fractions. Carpenters work with fractions a lot.
A model that imitates something in the real world is called a simulator. A simulation imitates the operation of a real world or system over time.
When adding or subtracting fractions with different denominators and when reducing fractions to their lowest terms.
a model can not replicate all real world conditions --- study island :)
Real estate agents use basic math operations, typically high school level, to properly do their job. Basic math functions (multiplication, division, fractions, decimals and percentages) constitute most of the mathematical operations that a realtor needs.
Cutting pies and cakes to serve or measuring the ingredients to make them.
It is the model of something which is and remains constant.