The fraction, without reducing, is 625/1000.
To reduce 625/1000 to lowest terms, first find all the prime factors of 625 and 1000:
625 = 5⁴
1000 = 2³×5³
Divide 625 and 1000 by the common factors, which in this case is 5³:
625÷5³ = 5
1000÷5³ = 8
625/1000 = 5/8
625