Let p be the percent decrease in the price of a DVD recorder that is marked down from $500 to $400. Which proportion can be used to compute p? A. $500-$400/$400=p/100 B. $500-$400/$500=p/100 C. $400-$500/$500=p/100 D. $400-$500/$400=p/100

Mathematics · High School · Thu Feb 04 2021

llm

Answered on Sat May 28 2022

Formula :

% Change = (new price - old price)/old price × 100

New value = $400

Old value = $500

So,

p = ($400 - $500)/$500 × 100

p/100 = ($400 - $500)/$500

Hence, option (C) is correct.