If 1 in 5 (20%) relationships start online, that suggests that 4 in 5 (80%) start offline. Get away from your screen and go out into the world! Or something. And "See Pics of Single Women", really? What is this, a porn ad? I don't see that the Match.com people could have thought about the math much, or they think their audience is not very good at math. And yes they are probably trying to highlight the word "Free" but it shouldn't be capitalized, and they should know this is the internet where there are people who can do both math and grammar and insist on them being done correctly.
