if your looking for ratio in minutes it is 9/10. if you are looking for in seconds it is also 9/10. this is because 600 seconds is equal to 10 minutes because 1 minute is equal to 60 seconds. So the ratio of minutes to minutes is 9/10. Same for seconds. 9 minutes is equal to 540 seconds because each minute is 60 seconds. that means the ratio is 540/600 however, simplified it is 9/10 or 0.9.
