Respuesta :

[  ( 2 / 3 ) + 1 ] / 2 = ( 2 / 3 + 3 / 3 ) × ( 1 / 2 ) = ( 5 / 3 ) × ( 1 / 2 ) = 5 / 6 ;
the number between would be the average

the average is found by adding the numbers then dividing by how many numbers there were ( in this case 2, 2/3 and 1)

so 2/3+1=1 and 2/3
divide by 2
(1 and 2/3)/2
1=3/3
1 and 2/3=3/3+2/3=5/3
then divide by 2
(5/3)/2=5/3 times 1/2=5/6

the number is 5/6