4分之3*14+7*75%-0.75
= 3/4(14+7-1)
=3/4 * 20
=15
(5分之3+2.4/3分之2)/0.7
= 3/5 * 10/7 + 2.4*3/2 * 10/7
= 6/7 + 36/7
= 6