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put 45 over 100 like this 45/100 then reduce, in this case a common denominator would be 5 so 45 divided by 5 = 9 and 100 divided by 5 is 20, now you have 9/20 there are no more numbers that will divide into both 9 and 20 equally in whole numbers so thats it...... 9/20

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13y ago

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