The price of a gallon of unleaded gas has dropped to $2.81 today. Yesterday's price was $2.86 . Find the percentage decrease. Round your answer to the nearest tenth of a percent.
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how do i add fractions?
To find the percentage decrease, you need to first find the decrease, and then find how much that is in relationship to the original value.
It dropped from $2.86 to $2.81, so the decrease is $0.05. You divide the decrease, $0.05, with the original price, $2.86, to find the percentage decrease. Multiply that value by 100 to get the value in percent.
I'm still bad with that kind of percents, but I kept a few notes on how to find the whole, part, or percent of a number. I think you divide the part by the whole.