There are 90 girls and 60 boys in the sixth grade at a middle school. Of these students, 9 girls and 3 boy write left-handed. What percentage of the sixth graders at this middle school write left-handed?

If 12 out of 150 students are left handed, the percentage of students that are left handed is 8%.

To find the percentage of students that are left-handed, divide 12 by 150.

12/150 = 0.08

Next, multiply the quotient (0.08) by 100.

0.08*100 = 8