To calculate the percent change in the total amount raised by the girl's club, we can use the formula for percent change:
\[ \text{Percent Change} = \frac{\text{New Amount} - \text{Old Amount}}{\text{Old Amount}} \times 100 \]
In this case, the old amount (last year's fundraising) is $600, and the new amount (this year's fundraising) is $960.
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Calculate the difference: \[ \text{New Amount} - \text{Old Amount} = 960 - 600 = 360 \]
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Now, calculate the percent change: \[ \text{Percent Change} = \frac{360}{600} \times 100 \]
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Simplify: \[ \frac{360}{600} = 0.6 \] \[ 0.6 \times 100 = 60% \]
Therefore, the percent change in the total amount raised by the girl's club is 60%.