147/448 este rezultatul corect la calculul din imagine?

[tex]\it \dfrac{\Big(\dfrac{^{7)}4}{\ 5}-\dfrac{^{5)}5}{\ 7}\Big):\Big(\dfrac{3}{7}\Big)^2}{3\dfrac{1}{5}}=\dfrac{\dfrac{3}{35}:\dfrac{9}{49}}{\dfrac{16}{5}}=\dfrac{3}{35}\cdot\dfrac{49}{9}\cdot\dfrac{5}{16}=\dfrac{7}{48}[/tex]