Qonvert lets you convert rational numbers between different bases and between different representations such as positional notation and improper, mixed, continued and Egyptian fractions, as well as Greek and Roman numerals. The numbers can have basically arbitrary size and precision.
Converts strings representing rational numbers in decimal notation into fractions, including repeating decimals! Eg.: -4.3(7) = -4.37777777... = -197/45. [how to change rational numbers in decimal form to fraction form]
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