Converting from Decimal Fractions

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Decimal fractions which are of the following type can be converted to rational form.

Type A &amp; B
 * 1) When the number of numerals in the decimal part is fixed.
 * 2) When a certain sequence of numerals in the decimal part repeat (or recur) infinitely)

Type C

There also exist numbers whose decimal part contains numerals which neither continue infinitely nor display any pattern. Such numbers cannot be written in rational form as &ldquo;a/b&rdquo;. We will study such numbers, which are called &ldquo;irrational numbers&rdquo;, in a subsequent chapter.

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