Question

(13/11 -13/20) *11/5

Answer 1

Общий знаменатель 220
Тогда,
260-143/220=117/220
117/220*11/5=117/20*1/5=
=117/100=1,17

Answer 2

$( frac{13}{11} - frac{13}{20} ) *frac{11}{5} = frac{260-143}{220} * frac{11}{5} = frac{117}{220}* frac{11}{5}= frac{117}{20}* frac{1}{5}= frac{117}{100}=1.17$