Evaluate
-\frac{197}{247}\approx -0.79757085
Factor
-\frac{197}{247} = -0.7975708502024291
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\frac{76}{247}-\frac{273}{247}
Least common multiple of 13 and 19 is 247. Convert \frac{4}{13} and \frac{21}{19} to fractions with denominator 247.
\frac{76-273}{247}
Since \frac{76}{247} and \frac{273}{247} have the same denominator, subtract them by subtracting their numerators.
-\frac{197}{247}
Subtract 273 from 76 to get -197.
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