Here the question is asking to write 53% as a decimal. So
53% = 53/100
= 0.53
So writing in decimal requires first taking the percentage to fraction. You can take variety of cases as examples to show that all kinds of percentages can be taken to the decimal form. For instance if we take the case of 23%
Here first we have to write 23% in fraction and then it will be easy to take it to a decimal.
23% = 23/100
= 0.23