Digital televisions often have a width-to-height ratio of 16:9. The width of a TV screen is 120. What is it's height?

Question

I'm having a hard time understanding my math homework, any help?

Answer 1

Ratio where it is shown as x:y can also be seen as x/y

You can set two equation that are congruent to each other to find a missing information

With the TV having a ratio of 16:9 and you have a TV with known width of 120, you can do this:

16/9=120/h

9/16=h/120

120(9/16) = h

That's about it!