Questions & Answers about Bu başarıda şirketin payı yüzde elli.
How does yüzde elli mean "fifty percent"?
In Turkish, percentages use the locative case suffix -de (in/at). The word yüzde is simply yüz (one hundred) plus -de. So, yüzde elli literally translates to "in a hundred, fifty." Notice the order is the opposite of English: the percent word comes before the number.
Why is there an -ı at the end of payı?
It marks possession. This sentence uses a specific grammatical connection: şirketin (the company's) and payı (its share). The -ı on pay (share) links it back to the company.
Normally a 't' at the end of a word changes to 'd' before a vowel. Why does şirket stay as şirketin?
You are right that 't' usually softens to 'd' (like how yurt becomes yurdu). However, many foreign loanwords in Turkish are exceptions to this rule. Şirket (company) is borrowed from Arabic, so its final consonant does not soften when we add the suffix -in.
Where is the verb "is" in this sentence?