This is a useful method for when traveling between imperial and metric countries and need to know what kilometers to miles are.

The formula to convert kilometers to miles is number of (kilometers / 8 ) X 5

So lets try 80 kilometers into miles

80/8 = 10

multiplied by 5 is 50 miles!

Another example

40 kilometers

40 / 8 = 5

5 X 5= 25 miles