Question

There are 80 girls and 70 boys in the sixth grade. Of these students, 11 girls and 7 boys are left handed. What percentage of the sixth graders are left handed?

Answer 1

12% of the sixth graders are left handed. You can get these answers by adding the amount of students (150) and taking the amount of left handed individuals (18), then you use the percentage of 18/150 which is 12%

Answer 2

12% of the sixth graders are left handed.

Explanation:

There are 150 students in total. Out of those 150, 18 are left handed.

Step 1: We make the assumption that 150 is 100% since it is our output value.

Step 2: We next represent the value we seek with x.

Step 3: From step 1, it follows that 100% = 150

Step 4: In the same vein, x% = 18.

Step 5: This gives us a pair of simple equations:

100%=150(1)

x%=18(2)

Step 6: By simply dividing equation 1 by equation 2 and taking note of the fact that both the LHS

(left hand side) of both equations have the same unit (%); we have

100%/x% = 150/18

Step 7: Taking the inverse (or reciprocal) of both sides yields

x%/100% = 18/150

x = 12%

Therefore, 18 is 12% of 150 :)