Answer:
2 y = 100
10 y = 20
20 y = 10
Step-by-step explanation:
To find the answer divide Y by X since y is 200 in the first and x is 1 divide 200 by the second one and you will find you answer.
He/she idk, got a higher score on the second test. How you do it is divide the score by the number out of it so like 19 divided by 25. Umm for the ratio, I'm not really sure, I guess you just do 19:25 and 17:20