Final answer:
To find the percentage of basketballs that need to be inflated, divide the number of basketballs that need to be inflated (12) by the total number of basketballs (30) and multiply by 100. Therefore, 40% of the basketballs need to be inflated.
Step-by-step explanation:
To find the percentage of basketballs that need to be inflated, divide the number of basketballs that need to be inflated (12) by the total number of basketballs (30) and multiply by 100.
- Percentage = (12 / 30) × 100
- Percentage = 0.4 × 100
- Percentage = 40
Therefore, 40% of the basketballs need to be inflated, which corresponds to option b).