Fractions having different denominators is called

Only similar terms of algebraic expressions can be added or subtracted.

In an algebraic expression, terms with the same literal coefficients are dissimilar.

In an algebraic expression, terms with the same variables and the same exponents on those variables are similar.

To simply a fraction, simply divide both the numerator and the denominator by their greatest common factor.

To find the product of fractions, multiply all the numerators and all the denominators and simplify the result. Cancellation rules can also be used.

To find the quotient of a fraction, multiply the dividend by the reciprocal of the divisor and simplify the result.