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Cody was tall on the first day of school this year, which was taller than he was on the first day of school last year.How tall was Cody on the first day of school last year?
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Q. Cody was tall on the first day of school this year, which was taller than he was on the first day of school last year.How tall was Cody on the first day of school last year?
- Understand Relationship: Understand the relationship between Cody's current height and his height last year.Cody is currently tall, which is taller than his height last year. This means that his height last year was the base height, and is of that base height.
- Express Equation: Express the relationship in an equation.Let Cody's height last year be cm. Then, of is equal to cm. We can write this as: of cm
- Convert to Decimal: Convert the percentage to a decimal to use in the equation. as a decimal is . So the equation becomes:
- Solve for x: Solve for x by dividing both sides of the equation by .
- Verify Solution: Verify the solution.If Cody was tall last year, then a increase would be . Adding this to his height last year gives us , which matches the given current height.
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