Well, this can be written in many ways!
Let's simplify it first:
525/1500
(525/25)/(1500/25)= 21/600
(21/3)/(600/3)=7/200
We can also turn it into a decimal:
525/1500=0.35
There are more ways but I feel like I've answered your question. Let me know if you need more help.
