\(\dfrac{15}{35}:\dfrac{45}{46}\cdot\left(-\dfrac{3}{5}\right)\)
\(=\dfrac{3}{7}\cdot\dfrac{56}{45}\cdot\left(-\dfrac{3}{5}\right)\)
\(=\dfrac{8}{15}\cdot\left(-\dfrac{3}{5}\right)\)
`=-8/25`
\(\dfrac{15}{35}:\dfrac{45}{56}.\left(-\dfrac{3}{5}\right)\)
\(=\dfrac{56}{105}.\left(-\dfrac{3}{5}\right)\)
\(=-\dfrac{168}{525}=-\dfrac{56}{175}=-\dfrac{8}{25}\)