A glance at the pie chart provided reveals that before the refurbishment of the museum more than one third of the visitors were dissatisfied by their visit, while this ratio was fell to 15% after the refurbishment.
According to the data presented, the total number visitors after the refurbishment of the museum have been increased by 18000 people, and 40% of this population was satisfied with the museum. It should be taken into account that 35% of visitors who visited the museum after the refurbishment, were very satisfied with the changes. The year before the museum was refurbished, only 15% were very pleased with the museum. Out of 74000