Question

A number is divided by 9 , and the result is added to another
number divided by 20. If the first number is 3 and the
second is 5, evaluate the expression.

Answer 1

$\frac{3}{9} + \frac{5}{20} \\ = > \frac{1}{3} + \frac{1}{4} \\ = > \frac{1 \times 4}{3 \times 4} + \frac{1 \times3 }{4 \times 3} \\ = > \frac{4 + 3}{12} \\ = \frac{7}{12}$