This is the 299th most frequent Russian word.
процентов
"Процентов" means "percent" or "percentage" in English.
In this example, "процентов" is used to describe a fractional part of a discount.
Скидка на эту одежду составляет тридцать процентов.
The discount on these clothes is thirty percent.
In this sentence, "процентов" signifies the total extent or completeness of belief.
Он всегда убеждён в своей правоте на сто процентов.
He is always one hundred percent convinced of his correctness.
Here, "процентов" indicates a proportion or degree of certainty.