Final answer:
The recipe uses (1)/(8) pound more mushrooms than onions. You find the difference by subtracting the onion weight from the mushroom weight, which yields (1)/(8) pound, corresponding to option C.
Step-by-step explanation:
The question asks for the difference in weight between the quantity of mushrooms and onions used in a soup recipe. The recipe calls for (1)/(4) pound of onions and (3)/(8) pound of mushrooms. To find out how many more pounds of mushrooms are used than pounds of onions, we subtract the weight of the onions from the weight of the mushrooms.
(3)/(8) pound - (1)/(4) pound = (3)/(8) pound - (2)/(8) pound (since 1/4 is equivalent to 2/8) = (1)/(8) pound. So, there is (1)/(8) pound more mushrooms than onions in the recipe. Option C) (1)/(8)lb is the correct answer.
When converting weights, remember that 1 pound = 16 ounces. To convert pounds to ounces, multiply the number of pounds by 16. Conversely, to convert ounces to pounds, divide by 16.