Brittney can chop 15 onions in 5 minutes, so in 1 minute she can chop 15/5 = 3 onions.
Carl can chop 20 onions in 5 minutes, so in 1 minute he can chop 20/5 = 4 onions.
In 30 minutes, Brittney can chop 3 onions/minute x 30 minutes = 90 onions.
In 30 minutes, Carl can chop 4 onions/minute x 30 minutes = 120 onions.
Carl can chop 120 onions - 90 onions = 30 more onions than Brittney in 30 minutes.
#### 30
The answer is: 30
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
Brittney can chop 15 onions in 5 minutes. Carl can chop 20 onions within that same time. How many more onions can Carl chop in 30 minutes than Brittney?

### Answer:
