oblicz : (-6 i 2/3) : (-7 i 1/7) -  √169/225  prosze szybko!

(-6 2/3) : (-7 1/7) - √169/225 = (-20/3): (-50/7) - 13/15 = (-20/3) * (-7/50) - 13/15 = 14/15 - 13/15 = 1/15

[latex](-6frac{2}{3}) : (-7frac{1}{7}) - sqrt{frac{169}{225}}=(-frac{20}{3}) : (-frac{50}{7}) - frac{13}{15}=\ \=(-frac{20}{3}) cdot (-frac{7}{50}) - frac{13}{15}=frac{14}{15}-frac{13}{15}=frac{1}{15}[/latex]