Final answer:
The discount on the aquarium with an original price of $70 and a sale price of $60 is approximately 14.286%, which rounds to 14% discount.
Step-by-step explanation:
The student's question asks to determine the percent of discount given on an aquarium originally priced at $70, with a sale price of $60. To find the discount percentage, first, calculate the difference between the original price and the sale price: $70 - $60 = $10. Then, divide the discount amount by the original price to find the discount rate: $10 / $70 = 0.142857. Finally, convert this to a percentage by multiplying by 100, which gives approximately 14.286%. Rounding to the nearest whole percent gives us 14%.
Answer: The percent of discount to the nearest whole percent is 14% (option c).