Learn Farsi: عملکرد این کارمند به مراتب چشمگیرتر است، مگر نه؟ - The performance of this employee is by far more impressive, isn't it?

The phrase به مراتب means "by far" or "considerably." To intensify a comparison, you place it directly before the comparative adjective, which in this case is چشمگیرتر (more impressive). It functions just like adding "much" or "by far" before a comparative in English.

What is the literal meaning of the adjective چشمگیر?

It literally translates to "eye-catching." It is a compound word made of چشم (eye) and گیر (the present stem of گرفتن, to catch or take). Adding the comparative suffix -تر to the end gives us چشمگیرتر (more eye-catching / more impressive).

How is the word عملکرد (performance) formed?

It is a compound noun made from عمل (action or deed) and کرد (the past stem of کردن, to do). Notice that it connects to the next part of the phrase using an ezafe vowel: عملکردِ این کارمند (amalkard-e in kârmand), meaning "the performance of this employee."

How does the phrase مگر نه work at the end of the sentence?

مگر نه (literally "unless not") is a very common fixed phrase used to create a tag question in Farsi. You add it to the end of a statement when you expect the listener to agree with you, exactly like saying "isn't it?" or "right?" in English. It stays exactly the same regardless of what verb or tense was used in the main sentence.