By understanding the definition of specific gravity growth rate, we can understand "specific gravity" and "growth rate" respectively. First of all, "specific gravity" refers to the comparison of two quantities. Then "growth rate" refers to the growth amount/base period. And growth = current-base period. So the growth rate is equal to the current period/base period-1.
Correlation formula of specific gravity growth rate
Correlation formula. Here I will talk about how we recite or use this formula. I think there are some defects in mathematics teaching in some public examination cram schools at present. When you arrive at the test center, you will often list a bunch of formulas for students to recite.
As a result, it is easy to recite a bunch of formulas, and the principles involved in the questions can't be said. Mathematics is different from rote learning in liberal arts, which requires cramming education. Mathematical formulas must be fully memorized, and a series of secondary formulas are derived on the basis of understanding, which is also worth remembering.
Let's first list the most basic formulas according to the definition. Suppose these two quantities are x and y this year. Compared with last year, X increased by a% and Y increased by b%. This year's ratio is X/Y, and the proportional growth rate of last year is sought.
According to the definition of specific gravity growth rate, let's formulate (x/y)/((x/(100%+a%) *100%)/(y/(100+b%) *100.
*100%)/(y/(100+b%) *100%), this formula is simplified as: x * (100+b)/(y * (/kloc-0).
We use the simplified formula just now to divide by X/Y, (x/y)/((x * (100+b))/(y * (100+a)), and this formula finally gets: (100+a)/.