Learn Russian: У нас есть тридцать восемь вариантов и сто процентов информации. - We have thirty-eight options and a hundred percent of the information.

In Russian, compound numbers follow the rule of their last word. Because тридцать восемь (thirty-eight) ends in восемь (eight), it follows the rule for numbers 5 and above, which requires the noun to be in the genitive plural. So, вариант becomes вариантов.

Does сто (a hundred) also require the genitive plural for процентов?

Yes! The number сто acts just like numbers 5 through 20 (and any number ending in 5-9 or 0). It requires the noun that follows it to take the genitive plural. That is why the masculine noun процент gets the -ов ending.

Why is the word for information written as информации here?

It is in the genitive singular case to mean "of information." Just like in English, we are linking two noun concepts: a percentage of something. The nominative информация changes its -ия ending to -ии in the genitive case.

Is it possible to skip есть and just say У нас тридцать восемь вариантов?