You can calculate revenue acceleration over time by subtracting revenue at the beginning of the time period by current revenue. Then, divide the answer by the original revenue and multiply by 100. Your answer will be a percentage.
Let's look at an example. If you had $10,000 in revenue the first month of the year and $40,000 in the last month, you would subtract $10,000 from $40,000 to get $30,000. Then, divide by 10,000 to get 3. When you multiply by 100 you'll see that your business had 300% revenue growth for the year.