Question

11supra 30 -11supra12 cat e

Answer 1

$\frac{11}{30} - \frac{11}{12}$ (aducem la acelasi numitor comun adica 60)
$\frac{11}{30} - \frac{11}{12} = \frac{11*2-11*5}{60} = \frac{22-55}{60} = \frac{-33}{60} = \frac{-11}{20}$