10 \% \text { of } 40 km
Evaluate
4km
Differentiate w.r.t. k
4m
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\frac{1}{10}\times 40km
Reduce the fraction \frac{10}{100} to lowest terms by extracting and canceling out 10.
\frac{40}{10}km
Multiply \frac{1}{10} and 40 to get \frac{40}{10}.
4km
Divide 40 by 10 to get 4.
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