Question 130001
First add up all of the workers:

7,862,418+1,120,982+144,959+138,496+149,641+346,626=9,763,122


So there are a total of 9,763,122 workers in this sample



Now to find the percentage of workers who walk to work, simply divide the number of workers who walk by the total number of workers


138,496/9,763,122 = 0.014186



Now multiply by 100 to get a percentage


 0.014186*100= 1.4186%



So about 1.42% of the workers walk to work