Помогите плиззз 5,6 дам 20 баллов!!!!!
1/3=2/6=6/18=7/21, 2/5=6/15=10/25=28/70,6/11=12/22=30/55=36/66, 13/7=26/14=130/70=104/56, 80/120=8/12=2/3=10/15,30/48=5/8=10/16=15/24