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SAT® Subject Test in Math 1 & 2

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Modeling with Percentages

SATSTM-FQYDQX

Sarah's stock in a small company changed in value all throughout last year. After a few months, its value had doubled. Then it lost $30\text{%}$ of its value for a few months, and then its value increased by $10\text{%}$ to finish off the year.

The value of the stock at the end of the year is what percent of the stock at the beginning of the year?

A

$54\%$

B

$154\%$

C

$120\%$

D

$180\%$

E

$90\%$