Marks: Find Maximum Examination Marks

Let the maximum marks for the examination be denoted by M.

Girish scored 572 marks.

This score was 30 marks less than 28% of the maximum marks.

This means that 28% of the maximum marks is equal to Girish's score plus the deficit:

$ 0.28 \times M = 572 + 30 $

$ 0.28 \times M = 602 $

To find the maximum marks M, we rearrange the equation:

$ M = \frac{602}{0.28} $

$ M = \frac{60200}{28} $

$ M = 2150 $

So, the maximum marks for the examination were 2150.

Percentage: Calculate Friend's Score Percentage

Girish's friend scored 473 marks.

The maximum marks are 2150.

To find the percentage of marks scored by the friend, we use the formula:

$ \text{Percentage} = \left( \frac{\text{Score Obtained}}{\text{Maximum Marks}} \right) \times 100 $

Substituting the values:

$ \text{Friend's Percentage} = \left( \frac{473}{2150} \right) \times 100 $

$ \text{Friend's Percentage} = \frac{47300}{2150} $

$ \text{Friend's Percentage} = \frac{4730}{215} $

$ \text{Friend's Percentage} = 22\% $

Therefore, the friend scored 22% of the maximum marks.