The correct word to fill in the blank is "more".
The word "more" is used when comparing the quantity of something in a comparative form. In this case, we are comparing the marks secured by Krishna and Shilpa.
The sentence becomes:
Krishna secured more marks than Shilpa.
The correct answer is "more".
Arun’s present age in years is 40% of Barun’s. In another few years, Arun’s age will be half of Barun’s. By what percentage will Barun’s age increase during this period?