According to the information given in the exercise, you know that the 100% is 80.
Let be "x" the number that is the 53% of 80.
By definition, you can write 53% as a Decimal number by dividing it by 100. Then, this is:

You can write 100% as a Decimal number:

Knowing the above, you can set up the following proportion:

Now you must solve for "x":

The answer is:
