\"\"

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The part is 55 and the percent is 20. You need to find the whole.

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Let n represent the whole.

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Part = percent\"\"whole

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\"\"                (Substitute part = 55 and percent = 0.2)\"\"

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\"\"          (Divide each side by 0.2)

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\"\"                    (Cancel common terms)

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\"\"                      (Divide: \"\")\"\"

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55 is 20\"\" of 275.