In an entrance test one requires 522 marks out of a maximum of 600 to qualify. What is the cut-off in percentage terms?

To find the cut-off score in percentage terms, calculate the ratio of the required marks to the total marks and multiply by $100$:
$$\text{Percentage Cut-off}=\left(\frac{\text{Marks Obtained}}{\text{Maximum Marks}}\right)\times 100$$

$$\text{Percentage Cut-off}=\left(\frac{522}{600}\right)\times 100$$

$$\text{Percentage Cut-off}=\frac{522}{6}=87\%$$

Hence, the cut-off percentage is $87\%$.