Given Batch A yield 120 and Batch B yield 150, what is the difference in yields between Batch B and Batch A?

• A. 60
• B. 40
• C. 50
• D. 30

Answer: (D)

The difference shows how much more Batch B yields than Batch A. Subtract Batch A’s yield from Batch B’s: 150 − 120 = 30. So the difference is 30. The other numbers would come from subtracting a different base value from 150 (for example, 150 − 90 would be 60, etc.), which isn’t what Batch A’s yield is in this problem.