Calculate the total accumulated within the same measure

[Anonymous]

I have values ​​for 2 years, 2020 and 2021. In the previous year (2020), I calculate the simple variation of the accumulated of day X with the accumulated of the previous day X-1. With this amount, I make the product with the year 2021 and have a projection of values. I can calculate the predicted value for the following day but I can't calculate for the rest of the days and even if they accumulate, giving me an expected value for the end of the period and that's what I want. Can anyone help me with this?

LAST Var(%) = 35/32 = 1,09375 = 109,4%

Prediction = 25 * 109,4% = 27

Index	acum-2020	var(%)	acum-2021
1	12	0,0%	8
2	15	125,0%	12
3	18	120,0%	13
4	20	111,1%	15
5	22	110,0%	18
6	25	113,6%	19
7	28	112,0%	20
8	29	103,6%	22
9	32	110,3%	25
10	35	109,4%	27

[Anonymous]

Totally incomprehensible. Please try to word your problem in a way that people can easily understand. Otherwise you're not gonna get any answers. Start with this, please:

https://community.powerbi.com/t5/Community-Blog/How-to-Get-Your-Question-Answered-Quickly/ba-p/38490