Answer
$\dfrac{\dfrac{5x}{27}}{-\dfrac{10xy}{21}}=-\dfrac{7}{18y}$
Work Step by Step
$\dfrac{\dfrac{5x}{27}}{-\dfrac{10xy}{21}}$
Evaluate the division and simplify:
$\dfrac{\dfrac{5x}{27}}{-\dfrac{10xy}{21}}=\dfrac{5x}{27}\div-\dfrac{10xy}{21}=-\dfrac{21(5x)}{27(10xy)}=-\dfrac{21(5)}{27(10)y}=...$
$...=-\dfrac{105}{270y}=-\dfrac{7}{18y}$