It's by weight

Not the person you are replying to, but that is severely underestimating the amount of factory farming. They are the dominant method of production

Based on the EPA's definition of a Concentrated Animal Feeding Operation (i.e factory farm) and USDA census data:

All fish raised in fish farms were considered to be factory-farmed. More than 98% of hens and pigs. For chickens and turkeys, the share was more than 99%. Cows were a bit more likely to be raised outside in fields, with greater space and freedom. Nonetheless, 75% were still fed in concentrated feeding operations for at least 45 days a year.

https://ourworldindata.org/how-many-animals-are-factory-farmed

And even those that are not considered factory farmed don't always look how one may think, for instance non-factory farmed cows still use plenty of grain feed

Currently, 'grass-finished' beef accounts for less than 1% of the current US supply

https://iopscience.iop.org/article/10.1088/1748-9326/aad401

None of this is not limited to the US by any means. For instance in the UK:

There are more than 1,000 US-style mega-farms in England, Wales and Northern Ireland, including some holding as many as a million animals

https://www.theguardian.com/environment/2022/aug/18/uk-has-more-than-1000-livestock-mega-farms-investigation-reveals

Factory farming is unfortunately what scales well. If we want less factory farming we need the industry itself to be smaller. That is no impossible goal. Germany, for instance, has seen its overall meat consumption fall over the last decade

In 2011, Germans ate 138 pounds of meat each year. Today, it’s 121 pounds — a 12.3 percent decline. And much of that decline took place in the last few years, a time period when grocery sales of plant-based food nearly doubled.

https://www.vox.com/future-perfect/23273338/germany-less-meat-plant-based-vegan-vegetarian-flexitarian

60 % of mammals are livestock, not 60% live in factory farms

99% of US farmed animals live in factory farms, according to this random website I just found. I don't claim to be an expert, though, and worldwide is probably lower than than 99%, but I would bet you that the vast majority of livestock is factory-farmed.

Agreed though that not all livestock are factory farmed. I should have clarified.

I'll point out though that even some non-factory-farmed livestock are likely suffering. Bentham's Bulldog talks about how hens undergo severe agony:

Egg-laying hens in conventional farms endure about 400 hours (!!!!!) of this kind of disabling agony. Remember, this is agony about as bad as the worst thing that’s ever happened to you, unless you’ve had an experience as bad as being severely tortured.

(emphasis mine.)

--

A seal in the 4% living in the wild may be eaten alive by a killer whale or torn to shreds by a great white shark.

That's bad, though probably not anywhere near as much agony as being boiled alive for several hours until one's death. Regardless of whether you feel morally obligated to reduce wild animal suffering, you should admit that (a) from a utilitarian perspective, it's much easier to reduce factory farm suffering, and (b) from a deontological perspective, factory farming is (collectively) our fault, whereas the food chain isn't.

And how many percentage of all livestock do you think is "free range" like the cows you describe?

Estimates vary from 80% to 99% are factory farmed. Which means majority of meat anyone is eating is factory farm. Unless you can verify the source of your meat yourself, you most likely are eating tortured animals.

So this whole argument that I have friends and family that care for their livestock like it's their kids is the misrepresentation since, it maybe true that you know someone that is treating animals humane, it doesn't represent majority.

Sauce https://ourworldindata.org/how-many-animals-are-factory-farmed

The problem is that the infographic says "of all the mammals on Earth", which means individuals, not biomass. So the infographic is objectively false.