At the local media mart, 4 out of every 65 people who visit the store will receive a free dvd. if 455 people visit the store, how many dvd’s will be given away? \

Here's the ratio:
4:61 (65 - 4 = 61)\
We can turn this into an equation:
65n =455
n = 91/13
We insert these numbers:
4*91/13:61*91/13
364/13: 5551/13
28: 427
28 DVDs will be given away.

I’m confused what’s happening