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In 1975 the price of gasoline per gallon was 57.4cents. With the 1975 price as the...

In 1975 the price of gasoline per gallon was 57.4cents. With the 1975 price as the reference​ value, the gasoline price index for 1998 is 197.5. What was the cost of a gallon of gasoline in​ 1998?

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Answer #1

Solution:

Price index can be calculated as

Price index = ((Updated price)/older price)×100

197.5 = (Updated Price)/57.4)×100

Updated price = (197.5×57.4)/100 = 113.365

So its cost of a gallon of gasoline in 1998 is 113.4 cents.

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