(13/17*8/9-4/17*8/9)*(11/16+3/8)

спасибо, огромное

(13/17 * 8/9 - 4/17 * 8/9) * (11/16 + 3/8) =(104/153 - 32/153) * (11/16 + 6/16) = 72/153 * 17/16 = 1224/2448 = 1/2