Take a look at the following tables. Look for patterns. You might notice that you don't have to memorize the whole table but only one fraction for a given denominator. For example, if you know that every eighth is equal to 0.125, you can determine 3/8 by adding 0.125 to itself three times.

Notice that the ninths are missing from both tables. Just remember that the numerator is the decimal repeated. So 4/9 is equal to .4444...

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