Whilst this question seems complicated because numbers have been thrown in with words it is infact a simple question. There are 3 thirds in one.
1/3 + 1/3 + 1/3 = 1
Therefore there are 8 x 3 thirds in 8
8 x ( 1/3 + 1/3 + 1/3) = 8
8 x 3 = 24
There are 24 thirds in 8.