Jawabanmu

2014-02-27T22:13:40+07:00
5/3 12 lusin = 12 x 5/3 = 20  lusin = 20 x 12 = 240 buah
2014-02-27T22:14:12+07:00
1 lusin = 12 buah
12 × 12 = 144
5/3 × 144 = 240