Final answer:
To calculate the percentage of female teachers, divide the number of female teachers by the total number of teachers and multiply by 100%. The result is that 70% of the teachers are female.
Step-by-step explanation:
To find the percentage of female teachers in the school, we need to use the formula:
Percentage = (Number of female teachers / Total number of teachers) × 100%
Putting the given numbers into this formula, we get:
Percentage = (49 / 70) × 100% = 0.7 × 100% = 70%
So, 70% of the teachers are female, which corresponds to answer choice (b).