Customers at an ice cream shop took a survey. The results showed that 144 customers rated the shop as being "ver satisfactory." This number represented 45% of the total number of customers who took the survey.
What was the total number of customers who took the survey?
Question 2
2.
There are 90 girls and 60 boys in the sixth grade at a middle school. Of these students, 9 girls and 3 boys write left-handed. What percentage of the sixth graders at this middle school write left-handed?