Let's write the fraction $\dfrac{\color{red}5}{\color{blue}9}$ in words:

• The numerator is ${\color{red}5},$ so we write "five":

  $\qquad$ "five"

• The denominator is ${\color{blue}9}$ and the numerator is greater than $1,$ so we write "ninths":

  $\qquad$ "five ninths"

• Since there is no hyphen, we place a hyphen in between the two words:

  $\qquad$ "five-ninths"

Therefore, the fraction $\dfrac59$ written in words is five-ninths.

Let's write the fraction $\dfrac{\color{red}8}{\color{blue}17}$ in words:

• The numerator is ${\color{red}8},$ so we write "eight":

  $\qquad$ "eight"

• The denominator is ${\color{blue}17}$ and the numerator is greater than $1,$ so we write "seventeenths":

  $\qquad$ "eight seventeenths"

• Since there is no hyphen, we place a hyphen in between the two words:

  $\qquad$ "eight-seventeenths"

Therefore, the fraction $\dfrac{8}{17}$ written in words is eight-seventeenths.

There are ${\color{blue}5}$ parts of the shape in total, and ${\color{red}4}$ parts are shaded.

So, the fraction model shows $\dfrac{\color{red}4}{\color{blue}5},$ which we write in words as follows:

• The numerator is ${\color{red}4},$ so we write "four":

  $\qquad$ "four"

• The denominator is ${\color{blue}5}$ and the numerator is greater than $1,$ so we write "fifths":

  $\qquad$ "four fifths"

• Since there is no hyphen, we place a hyphen in between the two words:

  $\qquad$ "four-fifths"

Therefore, the fraction $\dfrac45$ written in words is four-fifths.

The line is split into ${\color{blue}8}$ parts, and the number is located ${\color{red}5}$ steps from $0$ (left to right). So, the fraction model shows $\dfrac{\color{red}5}{\color{blue}8},$ which we write in words as follows:

• The numerator is ${\color{red}5},$ so we write "five":

  $\qquad$ "five"

• The denominator is ${\color{blue}8}$ and the numerator is greater than $1,$ so we write "eighths":

  $\qquad$ "five eighths"

• Since there is no hyphen, we place a hyphen in between the two words:

  $\qquad$ "five-eighths"

Therefore, the fraction $\dfrac58$ written in words is five-eighths.

Let's write the fraction $\dfrac{\color{red}39}{\color{blue}100}$ in words:

• The numerator is ${\color{red}39},$ so we write "thirty-nine":

  $\qquad$ "thirty-nine"

• The denominator is ${\color{blue}100}$ and the numerator is greater than $1,$ so we write "hundredths":

  $\qquad$ "thirty-nine hundredths"

• Since there is already a hyphen, we do nothing else.

Therefore, the fraction $\dfrac{39}{100}$ written in words is thirty-nine hundredths.

Let's write the fraction $\dfrac{\color{red}7}{\color{blue}26}$ in words:

• The numerator is ${\color{red}7},$ so we write "seven":

  $\qquad$ "seven"

• The denominator is ${\color{blue}26}$ and the numerator is greater than $1,$ so we write "twenty-sixths":

  $\qquad$ "seven twenty-sixths"

• Since there is already a hyphen, we do nothing else.

Therefore, the fraction $\dfrac7{26}$ written in words is seven twenty-sixths.