What is half of 8 8 1

Calculate proportions with fractions

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With the help of fractions you can Proportions of sizes be calculated. The simplest example is "Calculate half of ...". To do this, you can divide by or multiply by. But why does it work?

Let's take an example task:

"Calculate half of."

We could just divide now:

But instead of the division we can also do one Multiplication by a fraction perform as follows:

We learned that this conversion is allowed by dividing fractions.

We see here that can be replaced with.

In the following, let's calculate a few examples in which we create fractions with fractions.

Example: (1/8) of 1000 kg

You are asked for 1 out of 8 “parts” of the whole of the same size. Our "whole" are those.

Without the fractions, we could do the division directly:.

With the help of the fraction calculation:

Example: (3/8) of 100 m

You are asked for 3 of 8 “parts” of a whole of the same size. Our "whole" are those.

Without the fractions, we could do the division directly:. That is 1 part of 8 parts. However, you will be asked for 3 parts, therefore:.

This is faster with the help of fractions:

Example: (3/20) of 1 hour

You are asked for 3 of 20 “parts” of one hour of the same size.

We solve this with the help of fractions:

Now we can convert the hours to minutes:

Solution: hours correspond to minutes.