Calculate circumference. You can do the math mentally with area & perimeter,but circumference is much more complex
The answer to your question that you’re trying to figure out is [3,5]
We need to find the difference first. 65 - 60 = 5. Now we must find what percent 5 is of 65. It is 7,7%. The number decreased, and so it is a 7,7% decrease.
The answer is 64. Hope it helps you
