Calculator
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The tool adds a/b + c/d by putting them over a common denominator (b × d) and summing the numerators, returning the combined fraction. It keeps the arithmetic exact rather than rounding to a decimal.
The sum is returned as a straightforward fraction and may not be in lowest terms. Divide the numerator and denominator by their GCD — the GCD/LCM tool can help — to simplify.
That is the promise behind every tool here. Files are read in your browser tab, processed there, and discarded when you close it — never uploaded to our servers.
