4/5 : 3/8; =4/5*8/3=32/15=2 2/15
12 : 8/15; =12*15/8=45/2=22 1/2
2 2/3 : 16; =8/3*1/16=1/6
4/11 : 2 2/33; =4/11*33/68=3/17
1 2/3 : 2 1/2=5/3*2/5=2/3
4/5 * 3/8; =3/10
12 *8/15;=32/5=6 2/5
2 2/3 * 16;=8/3*16=128/3=42 2/3
4/11 * 2 2/33; =4/11*68/33=272/363
1 2/3 * 2 1/2=5/3*5/2=25/6=4 1/6