Evaluate
-\frac{1}{420}\approx -0.002380952
Factor
-\frac{1}{420} = -0.002380952380952381
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\frac{-1}{21\times 20}
Subtract 21 from 20 to get -1.
\frac{-1}{420}
Multiply 21 and 20 to get 420.
-\frac{1}{420}
Fraction \frac{-1}{420} can be rewritten as -\frac{1}{420} by extracting the negative sign.
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