Question

($frac{3}{4}$+$frac{7}{5}$)·0,7:$frac{86}{17}$

Answer 1

= $(frac{3cdot 5}{4cdot 5} + frac{7cdot 4}{5cdot4})cdot frac{7}{10}cdot frac{1}{frac{86}{17}} = (frac{15}{20} + frac{28}{20})cdot frac{7}{10}cdot frac{17}{86} = frac{43}{20} cdot frac{7}{10} cdot frac{17}{86} = frac{1}{20}cdot frac{7}{10} cdot frac{17}{2} = frac{7cdot 17}{20cdot 10cdot 2} = frac{119}{400}$

Answer 2

1)3/4+7/5=0,75+1,4=2,15
2)2,15*0,7=1,505
3)1,505:86/17=1,505*17/86=0,2975