Write the following fractions in number form:

(i) one-sixth

(ii) three-eleventh

(iii) seven-fortieth

(iv) thirteen-one hundred twenty fifth

(i) one-sixth

Hence, one-sixth in number form is $\dfrac{1}{6}$.

(ii) three-eleventh

Hence, three-eleventh in number form is $\dfrac{3}{11}$.

(iii) seven-fortieth

Hence, seven-fortieth in number form is $\dfrac{7}{40}$.

(iv) thirteen-one hundred twenty fifth

Hence, thirteen-one hundred twenty fifth in number form is $\dfrac{13}{125}$.