Question

calculati
$\frac{2}{27} - 2.0(1)$

Answer 1

===========================

Answer 2

2,0(1)=(201-20)/90=181/90
(2/27)-(181/90) = (20-543)/270 = -523/270
Numitorul comun este 270; am amplificat prima fractie cu 10 si a doua cu 3.