#6/7# cannot be converted to a fraction with a denominator which is a power of 10.
#6/7# also means #6div 7#
#6 div 7 = 0.8571428... # it recurs, but we only need the first 3 decimal places to be able to give the answer to the nearest hundredth (2 decimal places)
#6/7 = 0.86#