How to calculate the negative growth rate?

The general formula for calculating the growth rate is to add an absolute value in order to eliminate the influence of negative numbers. For the first type, the profit growth rate = ABS [(- 50 + 100) / - 100] = 50%; for the second type, the profit growth rate = ABS [(50 + 100) / - 100] = 150%

How to calculate the month on month growth rate? The report period is negative and the base period is positive

The month on month growth rate must be negative. Month on month growth rate = (reporting period data - base period data) / base period data

How to calculate GDP growth rate when CPI is negative

When calculating the growth rate of GDP, we should deal with the inflation of GDP. We can get the degree of inflation or deflation through CPI. If CPI is negative, it means deflation! I don't know if I'm right, I'm not a professional, ha ha!

If last year's profit is negative and this year's profit is positive, how to calculate the growth rate? Some people say that the absolute value should be taken, while some people say that the Statistics Bureau stipulates that the base number is negative
If last year's profit is negative and this year's profit is positive, how to calculate the growth rate? Some people say that the absolute value is taken. Some people say that the Statistics Bureau stipulates that the base is negative and the growth rate is not calculated. Please give an example

If the previous year was negative, we can't calculate the growth rate, we can only list the amount of growth. In addition, the absolute value method is incorrect

How to calculate the negative growth rate?