Question

Cum se transforma 13 supra 9 si 137 supra 45 in fractiu zecimale periodice?

Answer 1

$\frac{13}{9}=1.(4)$
$1.(4)= \frac{144-1}{99}= (\frac{143}{99}):11= \frac{13}{9}$

$\frac{137}{45}=3.0(4)$
$3.0(4)= \frac{304-30}{90}= (\frac{274}{90}):2= \frac{137}{45}$