From the percentage given, the markdown of the plastic cup will be $0.687.
From the information given, it was stated that Plastic cups are regularly priced at $2.29 and the markdown rate is 30 percent.
Therefore, the markdown will be:
= 30% × $2.29
= 0.3 × $2.29
= $0.687
Learn more about percentages on:
https://brainly.com/question/24304697