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例1 国际上常用恩格尔系数(记作n)来衡量一个国家和地区人民生活水平的状况,它的计算公式为n=食品消费支出总额/消费支出总额×100％.的计算公式为n=食品消费支出总额/消费支出总额×100％.各种类型家庭的n如下表所示:
Example 1 The Engel’s Coefficient (remembered as n) is used in the world to measure the living conditions of people in a country and a region. Its formula is n = total food consumption expenditure / total consumption expenditure × 100%. The formula is n = food Total consumption expenditure/total consumption expenditure × 100%. For each type of family, n is shown in the following table: