Final answer:
To find the number of egg sandwiches Lillian makes, subtract the number of tuna and ham sandwiches from the total. 25% of 480 are tuna sandwiches and 45% are ham sandwiches. Subtracting these from the total gives you the number of egg sandwiches.
Step-by-step explanation:
To find the number of egg sandwiches that Lillian makes, we need to subtract the number of tuna and ham sandwiches from the total number of sandwiches she makes.
First, we find 25% of 480 to find the number of tuna sandwiches: 25% of 480 = 0.25 * 480 = 120.
Next, we find 45% of 480 to find the number of ham sandwiches: 45% of 480 = 0.45 * 480 = 216.
Finally, we subtract the number of tuna and ham sandwiches from the total number of sandwiches to find the number of egg sandwiches: 480 - 120 - 216 = 144.