Evaluate
\frac{1}{20000000000000000000}=5 \cdot 10^{-20}
Factor
\frac{1}{2 ^ {20} \cdot 5 ^ {19}} = 5 \times 10^{-20}
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\frac{10}{2\times 100000000000000000000}
Calculate 10 to the power of 20 and get 100000000000000000000.
\frac{10}{200000000000000000000}
Multiply 2 and 100000000000000000000 to get 200000000000000000000.
\frac{1}{20000000000000000000}
Reduce the fraction \frac{10}{200000000000000000000} to lowest terms by extracting and canceling out 10.
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