Keeping It All in English Units

As disjointed as the English measurement system seems to be, it has a long tradition and some interesting and charming equivalences. Here are some more uncommon but historic measures, plus, to finish it off, a rate. 

1 rod = 16X feet 1 fathom = 6 feet 1 furlong = 220 yards 1 hand = 4 inches 

1 mile per hour = 88 feet per minute = 1 tf feet per second 

The Problem The Preakness, one of the horse races in the Triple Crown, has a distance of 9.5 furlongs. How many miles is that  

To change a terminating decimal to its fractional equivalent, create a fraction that has all the digits to the right of the decimal point in the numerator and, in the denominator, a power of 10 that has as many zeros as there are digits in the numerator. Then reduce the fraction. For the decimal 0.1875, you write 1875 in the numerator and a 1 followed by four zeroes in the denominator. 

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