$(\frac{5}{12}+1-\frac{7}{11}):(\frac{2}{3}-\frac{1}{4}+\frac{5}{11})$
$=(\frac{55}{132}+\frac{132}{132}-\frac{84}{132}):(\frac{88}{132}-\frac{33}{132}+\frac{60}{132})$
$=(\frac{55+132-84}{132}):(\frac{88-33+60}{132})$
$=\frac{103}{132}:\frac{115}{132}$
$=\frac{103}{132}.\frac{132}{115}$
$=\frac{103}{115}$