Two fifths of the instruments in the marching band are brass, one third are percussion and the rest are woordwinds. two fifths of the brass instruments are tubas, if there are 240 instruments in the band, how many are tubas?

As we are dealing only with the tubas which are part of the brass section we can ignore the percussion and woodwind for this question.

2/5 of 240 = 2/5 x 240 = 96 brass instruments

2/5 of 96 = 2/5 x 96 = 38.4 tuba players

I suspect that the question may be wrong!