This question is equivalent to asking one to maximize the value of a fraction of the form $\frac{m}{n}$, and to do so we should choose to make $m$ as large as possible, and $n$ as little as possible, so that the resulting fraction has the greatest possible value. Does this make sense?

Vidhi shah says

Hi could you explain the basic of why the numerator should be maximize and denominator minimize

GMAT Quantum says

Hi Vidhi,

This question is equivalent to asking one to maximize the value of a fraction of the form $\frac{m}{n}$, and to do so we should choose to make $m$ as large as possible, and $n$ as little as possible, so that the resulting fraction has the greatest possible value. Does this make sense?

Dabral