Evaluate
\frac{113}{399}\approx 0.28320802
Factor
\frac{113}{3 \cdot 7 \cdot 19} = 0.2832080200501253
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-\frac{210}{399}+\frac{323}{399}
Least common multiple of 19 and 21 is 399. Convert -\frac{10}{19} and \frac{17}{21} to fractions with denominator 399.
\frac{-210+323}{399}
Since -\frac{210}{399} and \frac{323}{399} have the same denominator, add them by adding their numerators.
\frac{113}{399}
Add -210 and 323 to get 113.
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