Answer:
-3
Step-by-step explanation:
3(-2)/2
-6/2 = -3
multiply 6:8 by 2
12:16
200
2000 girls :1000 boys
2000 +1000 =3000
20% of 3000 = 600
I girl : 2 boys
1+2=3
600÷3 = 200
200 boys wore glasses