How do you convert 7.8 km to miles?

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Answer 1 · 2016-08-17T12:42:18

$x = 4.875 miles$ $x = 4.875 " miles"$

You need to know a conversion factor.

5 miles = 8 km OR 1 mile = 8/5 km OR 1 km = 5/8 mile

For the same distance, the number of miles is less than the number of km.

$7.8 k m \times \frac{5}{8} = 4.875 miles$ $7.8 km xx 5/8 = 4.875 " miles"$

Or by direct proportion:

$\frac{miles}{km} = \frac{x}{7.8} = \frac{5}{8}$ $("miles")/("km") = x/7.8 = 5/8$

$x = \frac{7.8 \times 5}{8}$ $x = (7.8xx5)/8$

$x = 4.875 miles$ $x = 4.875 " miles"$