The important thing to understand about UBM is that it's a metric of performance from the systems that have run the benchmark, and it's ever changing.
If you had a system that was 110% on everything, you wait a couple of years and it's 90% on everything, because the performance of equipment running the benchmark have gotten better. Your system is fairly old and not super high spec to begin with.
Something that helps when running benchmarks is to turn off everything else running in the background. You are showing 16%, which isn't helping to score higher.
This computer is on a level where it should be good for surfing, media consumption, productivity, and VERY light gaming on stuff that is older and/or easy to run.