



 
Hi Ally, He purchased the wheat for $\$150$ per tonne and sold it for $\$170$ per tonne so his profit was $\$20$ per tonne. You want the profit expressed as a percentage but you didn't say a percentage of what. If the profit is seen as a percentage of his cost then it is \[\frac{20}{150} \times 100.\] If the profit is seen as a percentage of his selling price then its \[\frac{20}{170} \times 100.\] You should check your textbook for the definition of "percentage profit". Then he had a $12\%$ discount on the selling price. What is $12\%$ of the selling price? Subtract that from the selling price. What is this new selling price? Penny  


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