Question

2 2/7*2,4*1 5/9*1 9/16 : 3 1/3*1,125*1 5/7

Answer 1

$2 frac{2}{7} * 2,4 * 1 frac{5}{9} *1 frac{9}{16} : 3 frac{1}{3} *1,125 * 1 frac{5}{7} = \ \ =frac{16*24*14*25*3*1125*12}{7*10*9*16*10*1000*7} =$
=$= frac{1*12*2*1*1*225*12}{1*5*3*1*2*40*7} = \ \ = frac{1*3*2*1*1*3*3}{1*1*1*1*1*1*7} = frac{54}{7} =7 frac{5}{7}$
или 
Если знак ÷  - дробная черта:

$frac{2 frac{2}{7}* 2,4* 1 frac{5}{9}*1 frac{9}{16} }{3 frac{1}{3 }*1,125*1 frac{5}{7} } =2 frac{11}{12}$ 
 1) $2 frac{2}{7}* 2,4* 1 frac{5}{9}*1 frac{9}{16} = frac{9*24*14*25}{7*10*9*16} = frac{1*3*1*5}{1*2*1*1} = frac{15}{2} =7 frac{1}{2}$
$2) 3 frac{1}{3 }*1,125*1 frac{5}{7}= frac{4*1125*12}{3*1000*7} = frac{4*45*4}{1*40*7} = frac{2*9*1}{1*1*7} = frac{18}{7} =2 frac{4}{7}$
$3) 7 frac{1}{2} : 2frac{4}{7} = frac{15*7}{2*18} = frac{5*7}{2*6} = frac{35}{12} =2 frac{11}{12}$