Earth like planet, more surface area under water?

Planet: earth like, half the radius of earth, gravity is .7g. Assuming this is possible and humans live on this planet, would it be possible to have 90% of the planets surface area be under water? Doesn't have to be all a deep ocean and it would have at least a couple main continents/islands. What about 85% and 80%?

I read something similar to this but it seemed that it was for earlier stages of evolution. Trying to see how possible human life would be with a planet like this. Thanks!

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Earth like planet, more surface area under water?

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