If you mean to simplify fractions, you look for common factors between the numerator (top part) and the denominator (bottom part), and divide both by any common factor. For example, in the fraction 2/6, top and bottom are multiples of 2, so you can divide top and bottom by 2 and get 1/3.
33.3% as a ratio in lowest terms would be 1:3
1/5
1/5
14:9
17 and 4/25
In their lowest terms
33.3% as a ratio in lowest terms would be 1:3
9/10
1/5
1/5
1/5
It is 1413/5000 in its lowest terms
14:9
5/4
1/4
It is: 0.05 = 1/20 in its lowest terms as a fraction
4/5