Explanation:

- Total employees in Company B originally: 690

- Original male to female ratio in B: 13:10

- Calculating number of males in B:

$$ \text{Males} = \frac{13}{23} \times 690 = 390 $$

- Calculating number of females in B:

$$ \text{Females} = \frac{10}{23} \times 690 = 300 $$

- After changes in Company B:

- Males left: 90

- New females added: 200

- Updated number of males:

$$ 390 - 90 = 300 $$

- Updated number of females:

$$ 300 + 200 = 500 $$

- Total employees now:

$$ 300 + 500 = 800 $$

- Percentage of females:

$$ \frac{500}{800} \times 100 = 62.5\% $$

- Final Answer: Option 2, 62.5%