How to calculate percentage improvement in response time for performance testing

Question

How should I calculate the percentage improvement in response time.

I am getting 15306 ms response time for old code and 799 ms response for th

Answer 1

((old time - new time) / old time) * 100
This formula will give the Percentage Decreased in New Response time.

In your case, ((15306 - 799)/ 15306) * 100 = 94.78 %