... The pie chart describes data about visitor’s age, according to the age groups 2 0- 30, 3 0- 40, 4 0- 50, 5 0-6 0 and 6 0- 70 It is highlighted in a pie Travelers were under 40 year old visited Hanoi ... (6 0- 70) the proportion of people visited Hanoi increased times with 4 0- 50, 5 0- 60 group To sum up, the young visitors were interesting in Hanoi more than the old people were, especially 4 0- ... 3 0- 40 nearly doubled the first group and stood at 41, 7% In opposition, the remaining groups were totally low There was dramatically decrease from 41, 7% to 8, % in 4 0- 50 and next group 50-...