Try these three skills to help practice for your test. You should be able to do all three of these without a calculator.
Converting percents to decimals - https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-percent-decimal-conversions/e/converting_percents_to_decimals
Finding percents - https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-percent-problems/e/finding_percents
Discount, tax, and tip word problems - https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-percent-problems/e/finding_percents
You should also be able to calculate Simple Interest and Percent Change.
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