{2又3分之2-[(1.5×2又3分之2)÷6分之1-1又7分之1]}÷3分之8

{2又3分之2-[(1.5×2又3分之2)÷6分之1-1又7分之1]}÷3分之8
= 2 + 2/3 - [ ( 3/2 x 8/3 ) x 6 - 8/7 ] x 3/8
= 2 + 2/3 - [ 4 x 6 - 8/7 ] x 3/8
= 2 + 2/3 - 167 /7 x 3/8
= 2 + 2/3 - 167 /7 x 3/8
= 2 + 2/3 - 501 / 56
= 2 - (1503 - 112) / 168
= 2 - 1 391 / 168
= 2 - 8 - 47/168
= - 6又 168分之 47
再问： 3/8是几分之几