What is point 864 as a fraction?

0.864 as a fraction

0.864/1.000

Note it is wrtten as 'one point and the given number of zeroes as decimal places.

Hence

0.864 / 1.000

Cancel down the decimal point

0864./1000

Ignoire the prefix 'zero'

864/1000

Cancel down by '4'

216/250

Cancel down by '2'

108/125 Done !!!!