In the US, 0-59% is a failing grade. In college, it's even harder. And if you don't get at least 80 or 90%, you will have far less opportunities, unless you're like me and drop out of college to blaze your own path.
I went to college and got near perfect grades, it be fun studying, while worshipping the holy porcelain god, because I drank too much. Luckily I learned to hate being hung over and quit partying. I would have my masters, but I cost my school a 5 million dollar donation from the native american governors. I am too much a damned idealist lol. I have made most of my money from acting and other trades. I think college is overrated and one can learn skills, on the job. .