Numerator

The number of parts in the circle represents the denominator of the fraction, and the number of colored parts represents the numerator.

The circle is divided into 2 parts, 1 part is colored.

Now let's write it and we get:

$\frac{1}{2}$

The number of parts in the circle represents the denominator of the fraction, and the number of colored parts represents the numerator.

The circle is divided into 3 parts, 2 parts are colored.

Now we'll write and get:

$\frac{2}{3}$

The number of parts in the circle represents the denominator of the fraction, and the number of colored parts represents the numerator.

The circle is divided into 3 parts, 1 part is colored.

Now let's write it and we'll get:

$\frac{1}{3}$

To know what the marked part is, we need to count how many colored squares there are compared to how many squares there are in total.

If we count the colored squares, we see that there are four such squares,

If we count all the squares, we see that there are seven such squares.

Therefore, 4/7 of the squares are marked, and that's the solution!

We can see that there are three shaded parts out of six parts in total,

that is - 3/6

But this is not the final answer yet!

Let'snotice that this fraction can be reduced,

meaning, it is possible to divide both the numerator and the denominator by the same number,

so that the fraction does not lose its value. In this case, the number is 3.

3:3=1
6:3=2

And so we get 1/2, or one half.
And if we look at the original drawing, we can see that half of it is colored.