Translation of "Slowest" in Japanese

They have the slowest digestion rate of any mammal.

哺乳類の中で消化スピードが 一番遅いんです

He may be the slowest one in our class.

うちクラスで一番足遅いかも。

Here we have assembled only athletes who have broken 10 minutes but, as you can see, Hirayama's record is the slowest of the five people.

ここでは１０分を切った選手のみを集めたのですが、見ての通り平山の記録は５人の中で最も遅い記録です。