Final answer:
The original price of pumpkins last week was $0.95 per pound, calculated by dividing the current price per pound by 0.80, which accounts for the 20% decrease to the price this week.
Step-by-step explanation:
To calculate the original price of pumpkins per pound before a 20% decrease, we need to recognize that the current price reflects 80% of the original price. This is because a 20% decrease would leave us with 100% - 20% = 80% of the original price. The current price is $0.76 per pound, so we can set up the following equation where x is the original price:
0.80 * x = $0.76
To find the original price x, we need to divide the current price by 0.80:
x = $0.76 / 0.80
x = $0.95
Therefore, the price of pumpkins last week was $0.95 per pound.