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100 cm = 1 meter, so 45 cm = 45/100 meter = 9/20 m

In my understanding;

Get the units the same;

What fraction is 45 cm of 100 cm?

Find the greatest common factor of the numerator and denominator to simplify the fraction -- 5 in this case;

5 into 45 = 9

5 into 100 = 20

So, what fraction is 45 of 100?

9 over 20.

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9y ago

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