Answer:
120 rings are 30% of Lou's sales. Lou's sales are higher by 20 rings.
Explanation:
Lou sold more rings by 20 rings. First to calculate this we need to find the value of 1 ring. We can do this by dividing 400 by 100% = 4 rings. Now that we know 1% of Lou's sales were 4 rings we can multiply that by 30% and the answer is 120 rings.