(22/7 - 2/3) divided by 2 is less than the value of 22/7 - 2/3
The number was 160 because 5/4•128=160. 5/4 represents inverting 80% and multiplying it by the number to determine how the result became 128. For checking over all you have to do is do 4/5 or 80%•160 which shall give you 128.
The image is really unclear but I will assume that the number of teams given = 66
and the formula is

plug in the number of teams

multiply both sides by two

subtract 132 from both sides and factor
t = 12
I think it might be this answer <span> 20501.6 </span>