Lesson Steps:

Since the number has 3 decimal places, multiply and divide it the number by 1000.
We'll get
125/1000
Dividing numerator and denominator by 5,
25/200
Again dividing by 5,
5/40
Again dividing by 5,
1/8

This cannot be factorized any further. Hence the answer is 1/8.

Answer:

1/8

Grade: 6
Level: Junior high
Subject: Math
Topic: Fractions