Only concern yourself with the revolving utilization, leave the loans. Here's an illustration:
CC A: CL 5K/balance 2K = 40% util (this is indvidual util)
CC B: CL 4K/balance 1K = 25% util (this is indvidual util)
CC C: CL 8K/balance 3K = 38% util (this is indvidual util)
Total available Credit = 17K
Overall util is 17K/6K = 35.20%