Are you serious?
This is not Calculus, or even Trig or Advanced Algebra.
Let's call Device Speed Test set 1
Let's call Laptop Speed Test set 2
Take 10 speed test for set 1. Add the results of each test, and then divide by 10. This is your AVERAGE for set 1.
Take 10 speed tests for set 2. Add the results of each test, and then divide by 10. This is your AVERAGE for set 2.
For the most accurate results, alternate tests between set 1 and set 2.
Now for the really tough part. divide the AVERAGE from set 2 by the AVERAGE from set 1. If the AVERAGE from set 1 is 5.0 (mbps) and the AVERAGE of set 2 is 2.5 (mbps)
2.5 divided by 5.0 = .5, or in layman's terms, 50%.
If your tongue was planted firmly in your cheek, my apologies.