68x87 i think?
sorry if that isnt right..
Answer:

Step-by-step explanation:
since its only 2/5 of 1 hour, two 2/5 equal 4/5 so we divide the 12 2/3 by 2 to find the 1/5 which is 6 1/3
÷2=


Step-by-step explanation:
In the second step while opening the bracket, instead of 'a', there should be - 4a.
Answer:
I think its b but im not sure
Step-by-step explanation: