1. **State the problem:** Florence bought 25 bags of dog treats with a 20% discount, paying 27. Cameron bought 15 bags without a discount. We need to find how much Cameron paid. 2. **Identify the formula and rules:** Let the original price per bag be $p$. Florence's total cost after 20% off is $25 \times p \times (1 - 0.20) = 27$. 3. **Calculate the original price per bag:** $$25p \times 0.8 = 27$$ $$20p = 27$$ $$p = \frac{27}{20} = 1.35$$ So, each bag costs 1.35 before discount. 4. **Calculate Cameron's total cost:** Cameron bought 15 bags without discount, so: $$15 \times 1.35 = 20.25$$ 5. **Final answer:** Cameron paid 20.25 for 15 bags of dog treats.