5*1/5*100; 24/25:6*25; 15/100:3:2; 3/8*7:3
5*1/5*100=100 24/25:6*25=4 15/100:3:2=0,025 3/8*7:3=0,875
5*1/5*100=10024/25:6*25=415/100:3:2=1/403/8*7:3=7/8
может так?