Answer:
![70\%](https://tex.z-dn.net/?f=70%5C%25)
Step-by-step explanation:
From the given stem and leaf plot, we can write the following data set:
3.7, 3.7,3.8,3.9,4.0,4.1,4.2,4.5,4.6,4.9,5.2,5.4,5.4,5.8,5.9,5.9,6.1,6.1,6.5
We have 20 data sets.
The number values that are below 5.8 are :
3.7, 3.7,3.8,3.9,4.0,4.1,4.2,4.5,4.6,4.9,5.2,5.4,5.4,5.8
There are 14 of them.
Therefore there are 14 out 20 that are less than or equal to 5.8
That is
![\frac{14}{20} = \frac{7}{10} = 0.7](https://tex.z-dn.net/?f=%20%5Cfrac%7B14%7D%7B20%7D%20%20%3D%20%20%5Cfrac%7B7%7D%7B10%7D%20%20%3D%200.7)
As a percentage, there are:
![0.7 \times 100\% = 70\%](https://tex.z-dn.net/?f=0.7%20%5Ctimes%20100%5C%25%20%3D%2070%5C%25)