Describe how multiplication and division of rational expressions can be done?

Answer 1

Suppose X1 = N1/D1 and X2 = N2/D2 are two rational expressions, where the numerators N1 and N2 and denominators D1 and D2 are simpler expressions.

Then

X1 * X2 = (N1*N2)/(D1*D2)

and

X1 / X2 = (N1*D2)/(D1*N2).