625 = 625/1.
http://wiki.answers.com/Q/What_is_fraction_for_625

The decimal .625 can be written as the fraction
http://www.chacha.com/question/whatis.625infra...

You count the number of digits after the decimal point (first one would be 10th, then 100th, then 1000th, etc. Since there are three digits, it would be over 1000, so you place 625
http://answers.yahoo.com/question/index?qid=201306...

As a fraction, it would be 13/8. To convert: Write down the decimal divided by 1. Multiply both top & bottom by 10 for every number after the decimal point.
http://www.kgbanswers.com/whatis1625asafracti...
