Can you help me calculate percentage please?

On January 1, 1999, the price of gasoline was $1.39 per gallon. If the price of gasoline increased by 0.5% per month, what was the cost of one gallon of gasoline, to the nearest cent on January 1 on year later?



I'm having a real hard time on this. Can you show me how to do this please?Can you help me calculate percentage please?
For a .5% increase, take your $1.39 x 1.005= $1.39695. You start the 2nd month at $1.3965 x 1.005 =$1.4039347. Start the 3rd month at $1.4039347 x 1.005 = $1.4109543. If you progressively multiply the sum at the end of each month by 1.005, here are your increased amounts after the end of each of the following months:



4th: $1.418009 5th: $1.425099 6th: $1.432224 7th: $1.4393855 8th: $1.4465824

9th: $1.4538153 10th: $1.4610843 11th: $1.4683897 12th: $1.4757316



So, in rounding off, if your gas increased .5% EACH month, after 12 months, it would cost $1.48.



If you were trying to figure out sales tax, you would do the math the same way. If your sales tax was 8.75% and you bought an item for $8.99, you would take that $8.99 x 1.0875 = $9.78.Can you help me calculate percentage please?
okay so the increase is .5%, or .005. so .005x12 = .06. so then to find the increase you take 1.39x .06 = .0834. so thats the increase, but you need to add it to 1.39. so the price would be $1.4734 or about $1.47.

tell me if you need more help



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