Найдите значение выражения: a) 4 4/17 * 4/17 * 3 2/5, b) (6 1/5 - 4 1/2) : 1 1/2.

a) (4 4/17)*(4/17)*(3 2/5) = (72/17)*(4/17)*(17/5) = (72*4*17)/(17*17*5) = 4896/1445. b) (6 1/5 - 4 1/2)/(1 1/2) = ((31/5)-(9/2))/(3/2) = (62/10-45/10)/(3/2) = (17/10)/(3/2) = (17*2)/(10*3) = 34/30 = 17/15.