Full deployment (1) The percentage decrease of this month compared with last month can be calculated by the following formula:? Chain growth rate = (this month-last month)/last month × 100%? (2) Ring-on-ring ratio, that is, the ratio of quantity change in two consecutive unit cycles (such as two consecutive months).

Year-on-year: compared with the same period in history, such as March 20 1 1 compared with March 20 10.

Ring comparison: compared with the previous statistical period, for example, April 20th11compared with March 20th1/.

Write down the year-on-year and month-on-month calculation formulas:

Ring comparison: current increase (decrease) rate (%) = (current price/previous price-1) × 100%.

Year-on-year: year-on-year growth (decrease) rate in this period (%) = (current price/price in the same period of last year-1) × 100%.