Question

Cum se inmultesc 2 rapoarte reprezentate prin litere ?
Cum se impart 2 rapoarte reprezentate prin litere? 

Answer 1

Niste exemple : 

$\frac{2a+1}{3b}$ · $\frac{5b}{3a+2}$ = $\frac{(2a+1)5b}{3b(3a+2)} = \frac{5(2a+1)}{3(3a+2)} = \frac{10a+5}{9a+6}$

$\frac{5y}{2x} : \frac{2y}{x} = \frac{5y}{2x}$ · $\frac{x}{2y}$ = $\frac{5xy}{4xy} = \frac{5}{4}$