I haven’t done this before but I’m sure it’s C. 15/5
5 is equal to 3.
45/27 is also equal to 5/3 (Divided both 45 and 27 by 9)
7.5:4.5 is also equal to 5:3 (Divided both 7.5 and 4.5 by 1.5)
15/5 is not equal because if you simplify it, it would become 3:1 (Divided both 15 and 5 by 5).
