1) 1/2=5/10=0,5;
2/5=4/10=0,4;
7/5=14/10=1,4;
4/5=8/10=0,8;
2) 1/4=25/100=0,25;
3/20=15/100=0,15;
8/25=32/100=0,32;
7/25=28/100=0,28;
1/50=2/100=0,02;
3)6/125=48/1000=0,048;
25/250=1/10=0,1;
7/200=35/1000=0,035;
9/500=18/1000=0,018;
4) 3 1/20=3 5/100=3,05;
2 3/50=2 6/100=2,06;
4 8/25=4 32/100=4,32;
7 11/20=7 55/100=7,55;
12 4/25=12 16/100=12,16;
9 13/50=9 26/100=9,26.