Question

(1/5+2/4)÷(4/10-5/2)

Answer 1

$\frac{ \frac{1}{5} + \frac{2}{4} }{ \frac{4}{10} - \frac{5}{2} } = \frac{ \frac{4 + 10}{20} }{ \frac{8 - 50}{20} } = \frac{ \frac{14}{20}}{ \frac{ - 42}{20} } = \frac{14 \times 20}{ - 42 \times 20} = \frac{14}{ - 42} = - \frac{1}{3}$