To calculate the percentage score, you need to know the total marks possible. The formula to calculate percentage is:
\[ \text{Percentage} = \left( \frac{\text{Score}}{\text{Total Marks}} \right) \times 100 \]
If you provide the total marks possible, I can help you calculate the percentage. For instance, if the total marks are 100, then:
\[ \text{Percentage} = \left( \frac{60}{100} \right) \times 100 = 60% \]
If the total marks are different, please specify, and I can perform the calculation for you.