Question

Se a representa um numero e a=(+7/60) . (-10/21) o valor de a na forma irredutivel e

Answer 1

$\boxed{a=\frac{7}{60}.\frac{-10}{21}=\frac{-1}{3.6}=-\frac{1}{18}}$

Answer 2

$\boxed {a= \frac{7}{60} . \frac{-10}{21} = - \frac{70:70}{1260:70} = - \frac{1}{18} }$