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Question

State whether the following statements are true or false, and explain why. If a statement is false, state the true change.

A high school reports that its students' SAT scores were down by $20 \%$ for one year. The next year, however, SAT scores rose by $30 \%$. The high school principal announces, "Overall, test scores have improved by $10 \%$ over the past two years."

Solution

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Answered 1 year ago

Step 1

1 of 3Here we will use the statement if the compared or new value is $p\%$ more than the reference value, it's value is then $(100+p)\%$ of the reference one.

Here we will use the statement if the compared or new value is $p\%$ less than the reference value, it's value is then $(100-p)\%$ of the reference one. Denote the SAT scores by $x$.

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