<image>Engel's coefficient =  × 100%.
The United Nations classifies the living standards of countries based on the value of the Engel's coefficient. A country with an average household Engel's coefficient greater than 60% is considered poor; between 50% and 60% is considered subsistence; between 40% and 50% is considered comfortable; between 30% and 40% is relatively affluent; between 20% and 30% is affluent; and below 20% is considered very affluent.
Uncle Li's family's total monthly consumption expenditure is 5000 yuan, of which the total food expenditure is 1600 yuan. Please use the Engel's coefficient to determine the living standard of Uncle Li's family.