The model is one whole divided into ten equal parts with nine parts shaded.
So, the model shows nine tenths.

Nine tenths written as a decimal has a 9 in the tenths place.
So, $\frac{9}{10}$ written as a decimal is 0.9.

The model is one full whole and one whole divided into one hundred equal parts with twenty-six parts shaded.
So, the model shows one and twenty-six hundredths.

One and twenty-six hundredths written as a decimal has a 1 in the ones place, a 2 in the tenths place, and a 6 in the hundredths place.

So, $1\frac{26}{100}$ written as a decimal is 1.26.

The model is one whole divided into ten equal parts with one part shaded.

So, the model represents one tenth, or $\frac{1}{10}$.

The model is one full whole and one whole divided into one hundred equal parts with seventy-three parts shaded.

So, the model represents one and seventy-three hundredths, or $1\frac{73}{100}$.