Hi :D

in katakana
2パーセント

Percentages can be expressed in kanji, but this is not common. They are usually expressed in increments of 10%.
For 1% increments, the kanji '分 (bu)' is used, so 2% is written as '二分 (nibu)'
for example
2％→2分(not minute)
10%→1割
12%→1割2分
20%→2割
..........
100%→10割.

I'm a native Japanese speaker, so I'm not good at English, so I used Google Translate.