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Pre-AlgebraHard

Pre-Algebra · Hard problem

A price of $200\$200 falls 50%50\%, then rises 50%50\%. Sam's work:

Step 1. After a 50%50\% decrease: $200→$100\$200 \to \$100 Step 2. After a 50%50\% increase: $100→$200\$100 \to \$200

Which step contains the first error? Answer with the step number.

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