Answer:
230 blue marbles
Explanation:
In order to answer this question, we need to find how many marbles are red.
We know that 25 marbles are green
15% of the marbles are red.
There are a total of 300 marbles.
We would multiply 300 by 0.15 to find how many marbles are red.
![300*0.15=45](https://img.qammunity.org/2020/formulas/mathematics/middle-school/avzsy9kkfkg6qd6ccr1ijgk77evcwycae1.png)
45 marbles are red.
In the question, it says the rest of the marbles are blue.
This means that we would subtract 300 by 25 and 45 to find how many marbles are blue.
![300-25-45=230](https://img.qammunity.org/2020/formulas/mathematics/middle-school/p2o6k1wi513k58hrn22ylvnk5k5tvur8e5.png)
This means that 230 marbles are blue.
I hope this helps!
Best regards,
MasterInvestor