Have good knowledge of CPI~~Math Answer–3 quick Math questions on consumer price index

Can you help me understand this Mathematics question?

1) Use the table to answer the following questions. Assume that all prices have risen at the same rate as the The Consumer Price Index (CPI).

Total spending on health care in the United States rose from $85 billion in 1976 to $2.7 trillion in 2011. Compare the relative change in health care spending to the overall rate of inflation as measured by the Consumer Price Index.

Relative change in health care spending Round to the nearest percent

Overall rate of inflation as measured by the CPI

Round to the nearest percent

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2) Use the CPI table above to estimate the average cost of a dozen eggs in 1986 to the nearest cent if it cost $1.09 in 1998.

What percentage increase is this?

%

Round your answer to the nearest tenth of a percent.

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3) Use the CPI table in the textbook to estimate the cost of a gallon of milk in 1998 to the nearest cent if it cost $2.22 in 1986.

What percentage increase is this?

%