Question

Daca 2a/3b=3/10,atunci b/a=???

Answer 1

2a/3b = 3/10
          ↓
2a×10=3×3b
          ↓
    20a=9b
          ↓
    b/a = 20/9 = 2,(2)

Answer 2

$\frac{2a}{3b} = \frac{3}{10} =\ \textgreater \ 20a = 9b =\ \textgreater \ \frac{b}{a} = \frac{20}{9}$