Samuel, a county social worker, helps county residents who are struggling with different issues. He uses “c” to indicate client hours and “o” to indicate other work in his time log. Samuel logs the following hours for the week:

Monday: 6 c, 4 o
Tuesday: 8 c, 2 o
Wednesday: 9 c, 1 o
Thursday: 7 c, 3 o
Friday: Off


What percent of his time did Samuel spend with clients on Thursday?