Answer:
See explanation.
Step-by-step explanation:

Common factor: y

Whats the expression so you can plug those numbers in.

Cross-multiplying and rearranging, we get:

or written without using latex:
k^2 = h^2 - 3mq
Can you finish now?
7/11 = 0.63 with a line over the 63 because it repeats = 63.6%