Rút gọn các phân số sau

24/48;56/49;74/100;25/225;18/198;75/150;42/98;80/240;64/720;18/30

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`@(24)/(48) = (24÷24)/(48÷24) = (1)/(2)`

`@(56)/(49) = (56÷7)/(49÷7) = (8)/(7)`

`@(74)/(100) = (74÷2)/(100÷2) = (37)/(50)`

`@(25)/(225) = (25÷25)/(225÷25) = (1)/(9)`

`@(18)/(198) = (18÷18)/(198÷18) = (1)/(11)`

`@(75)/(150) = (75÷75)/(150÷75) = (1)/(2)`

`@(42)/(98) = (42÷14)/(98÷14) = (3)/(7)`

`@(80)/(240) = (80÷80)/(240÷80) = (1)/(3)`

`@(64)/(720) = (64÷16)/(720÷16) = (4)/(45)`

`@(18)/(30) = (18÷6)/(30÷6) = (3)/(5)`