Express $\dfrac{2}{-7}$ as a rational number with denominator

(i) 42

(ii) -28

Express $\dfrac{-48}{36}$ as a rational number with numerator

(i) -4

(ii) 8

Write each of the following rational numbers in standard form :

(i) $\dfrac{56}{32}$

(ii) $\dfrac{16}{-40}$

(iii) $\dfrac{-36}{54}$

(iv) $\dfrac{-22}{-77}$

(v) $\dfrac{78}{-65}$

(vi) $\dfrac{-95}{114}$

(vii) $\dfrac{-69}{115}$

(viii) $\dfrac{155}{-217}$

Find the value of x such that :

(i) $\dfrac{-2}{3} = \dfrac{14}{x}$

(ii) $\dfrac{8}{-3} = \dfrac{x}{6}$

(iii) $\dfrac{5}{9} = \dfrac{x}{-27}$

(iv) $\dfrac{11}{6} = \dfrac{-55}{x}$

(v) $\dfrac{15}{x} = -3$

(vi) $\dfrac{-36}{x} = 2$