Mariana mixes yellow and blue paint in a ratio of 2 : 5 to make green paint. She pours the yellow and blue paint into a large can to mix it. When the can is full, she realizes she wants to create a darker green and fills the rest of 8 7the can with blue paint. What ratio of yellow to blue paint should Mariana use if she wants to create this same green color in the future?

Question

Mariana mixes yellow and blue paint in a ratio of 2 : 5 to make green paint. She pours the yellow and blue paint into a large can to mix it. When the can is  full, she realizes she wants to create a darker green and fills the rest of 8 7the can with blue paint. What ratio of yellow to blue paint should Mariana use if she wants to create this same green color in the future?

oobleck · Answer

If the can is full, how can she add any more paint?
and just what does "fills the rest of 8 7the can" actually mean?

It's not my job to figure out what you mean.
It's your job to say it so clearly you cannot be misunderstood.