Jang Hyukjin 장혁진 is 100%'s main vocal and maknae.
Hyukjin was born on Monday, December 20, 1993. The age gap between him and the oldest member, Minwoo, is 8 years, 10 months, and 12 days.
Like his fellow member Chanyong, he was born in the Chinese Year of the Rooster. He and fellow member Jonghwan were both born under the zodiac sign Sagittarius. He and Rokhyun both have the blood type B.
At a height of 176 cm or 5'9½", he and Rokhyun are the shortest members in the group. They're shorter than Chanyong, the tallest member, by 4 cm.
He's from Busan.