Question

for every 15 columns of news stories in a newspaper, 4 columns of ads are required. if a newspaper contains 300 columns of news stories, how many columns of ads must it have? question 4 options: check my answer

Explanation:

Step1: Find the ratio of ads to news columns

The ratio of ads to news columns is $4:15$. Let the number of ad columns be $x$ when news columns are 300. So we set up the proportion $\frac{x}{300}=\frac{4}{15}$.

Step2: Solve for $x$

Cross - multiply: $15x = 300\times4$. Then $15x=1200$. Divide both sides by 15: $x=\frac{1200}{15}=80$.

Answer:

80