[INFO]% of in/out traffic against total?

[XforceTR69]

Hello
i have a not so simple as it turns out problem,cant calculate the correct percentage of inbound and outbound traffic against the total traffic transmitted.The numbers dont add up e.g 114.69/347.62*100 = 32.99 and not 33.49.
As the time plotted gets larger so does the difference between the correct calc and what is printed.

The percents are cdefs and the total are vdefs but i havent found a way to calculate the totals from cdefs and make the total usable in the percent calculation.
I suppose its a difference in the datasources?cdefs refer to actual last/avg/max data while vdefs are taken from the graph,how can i overcome this?

On the second graph my link utilizations are correct since they use only cdefs.I have spent a lot of time on these with the goal of using it in aggregates,i have followed various posts in the forums but to no avail.
Grateful for any assistance!

ps:cacti 1.1.6

[XforceTR69]

Also my link utilization cdef which works succesfully.

[XforceTR69]

And my GPRINT attempt to percent of in or out traffic.