15/1 is the simplest way.
1.875 as an improper fraction in its simplest form is 15/8
15/8
10/15 = 2/3
0.0666 is a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction. Its equivalent, in rational form, is 666/10000. You can simplify this rational fraction if required.
6/45 = 2/15
15/100
It is 15/4 as an improper fraction in its simplest form
1.875 as an improper fraction in its simplest form is 15/8
15/8
10/15 = 2/3
12/15 = 4/5
14:45 written as a fraction in simplest form is 1/3
2/15
3/4
13/15
2x over 15
5/4 hours