Question

2 3/4 - [ 3 1/8 : { 5 - ( 4 2/3 - 11/12 ) } ]
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Answer 1

Step-by-step explanation:

It is given that

23/4−[31/8÷{5−(42/3−11/12)}]

We can write it as

=11/4−[25/8÷{5−(14/3−11/12)}]

By further calculation

=11/4−[25/8÷{5−(56−11)/12}]

So we get 

=11/4−[25/8÷{5−45/12}]

LCM of 12 and 1 is 12

=11/4−[25/8÷{(60−45)/12}]

By subtraction

=11/4−[25/8÷15/12]

We get

=11/4−[25/8×12/15]

On further calculation 

=11/4−5/2

LCM of 4 and 2 is 4

=(11−10)/4

=1/4

Answer 2

Answer:

23/4-[31/8 (5-(42/3-11/12)}]

=11/4-[25/8÷15-(14/3-11/12)}]

=11/4-[25/8-{5-(56-11)/12}]

=11/4-[25/8 (5-45/12}]

=11/4-[25/8-{(60-45)/12}]

=11/4-[25/8÷15/12]

=11/4-[25/8x12/15]

=11/4-5/2

=(11-10)/4