Ответ:
3/4=75/100, 1/2=50/100, 3/5=60/100, 3/10=30/100, 9/20=45/100, 2/25=8/100, 9/50=18/100;
2/3=40/60, 1/2=30/60, 3/4=45/60, 1/6=10/60, 4/15=16/60, 7/20=21/60, 11/30=22/60
910:35=26; 624:48=13, 42*49+40*50=4058, 100:25*4=16