The stock in Company A decreased by 2%, which means it is now worth 98% of what it was worth last year (100% - 2% = 98%).
The stock in Company B decreased by 25%, which means it is now worth 75% of what it was worth last year (100% - 25% = 75%).
The value of the stock in Company A has decreased to 0.98 * $2150 = $2107.
The value of the stock in Company B has decreased to 0.75 * $4000 = $3000.
The total value of the investor's stock account is now $2107 + $3000 = $5107.
The total decrease in the investor's stock account is $5107 - ($2150 + $4000) = $95.
The percentage decrease is $95 / ($2150 + $4000) * 100% = 1.3% (rounded to the nearest tenth). Answer: \boxed{1.3}.
An investor has an account with stock from two different companies. Last year, her stock in Company A was worth $2150 and her stock in Company B was worth $4000. The stock in Company A has decreased 2% since last year and the stock in Company B has decreased 25%. What was the total percentage decrease in the investor's stock account? Round your answer to the nearest tenth (if necessary).
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