Decimal Illustration

Consider the model.

 

There are four full grids. So, the whole number part is 4.

In the last grid, there are 100 squares out of which 65 are colored. So, the decimal part is sixty-five hundredths.

 

So, the part shaded in the model is four and sixty-five hundredths.

 

Now, let's write four and sixty-five hundredths as a decimal.

 

Four and sixty-five hundredths is written as the decimal 4.65.

 

So, the decimal number illustrated by the given model is 4.65.