The price of a notebook was $3.45 yesterday. Today, the price fell to $3.20. Fine the percentage decrease and round answer to nearest tenth of a percent.

Answer 1

You can calculate the percent decrease as

(Original Price - New Price) x 100/(Original Price) = Percent decrease

Original Price = $3.45

New Price = $3.20

(3.45 - 3.20) x 100/(3.45) = 7.25% decrease

7.25 rounds up 7.3%

Keeping in mind that the Original Price represents 100% of the cost

Take ratio of the New Price to the Original Price subtract it from 1, then multiply that number by 100 to get the percent decrease.

(1 - (3.20/3.45)) x 100 = 7.25 which also rounds to 7.3%

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