solve for variables

20/y=15/10=x/8

Split it into two separate equations.

20/y=15/10

Solve for Y by multiplying both sides by y and 10.

200 = 15y

Likewise, do the same for the second part.

15/10=x/8

Multiply both sides by 80.

120 = 10x

You should be able to do the rest. I hope this helps. Thanks for asking.