To solve this problem all you'll need to do is to multiply 20 by 20%. This will be the answer to your problem.
20% can be rewritten as .20; to convert a percentage into a decimal you would move the imaginary decimal point in front of the 20 to the left two spaces.
20% => .20
Now multiply 20 by 0.20 (20%).
20 * 0.20 = 4
This means that 4 ice cream shops are in the park, so your
Answer is:
4 ice cream shops
