Respuesta :

-(4/5)*(3/7)*(15/16)*(-14/9)   [two negatives make one positive]
=(4*3*15*14)/(5*7*16*9)   [simplify 4/16]
=(3*15*14)/(5*7*4*9)
=(3*3*14)/(7*4*9)
=(14)/(7*4)
=(2)/(4)
=1/2