Wrong answer in the Code Studio

In the guided session I am solving the aptitude question where I see this question
Two alloys of gold and copper mix in ratio 2:3. The 1st alloy contains gold and copper in ratio 2:3 and 2nd alloy contains gold and copper in ratio 1:1. What is the ratio of gold and copper in the final mixture?
When I am trying to submit the solution it shows that the answer is not correct I solve many times and my solution is correct when I am submitting the solution is shown we wrong even my answer is correct

same my answer is 23:27 still itss showing wrong

you should right 23:27. then it will be right