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=100/1000=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