Question

Приведите дробь:
4/9 5/6 7/2 к знаменателю 18
7/8 5/16 21/40 к знаменателю 80

Answer 1

К знаменателю 18:
$frac{4}{9} = frac{4*2}{9*2} = frac{8}{18}$

$frac{5}{6} = frac{5*3}{6*3} = frac{15}{18}$

$frac{7}{2} = frac{7*9}{2*9} = frac{63}{18}$

К знаменателю 80:

$frac{7}{8} = frac{7*10}{8*10} = frac{70}{80}$

$frac{5}{16} = frac{5*5}{5*16} = frac{25}{80}$

$frac{21}{40} = frac{21*2}{40*2} = frac{42}{80}$