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To rewrite the ratio \(15 : 42\) in the form \(1 : n\), we need to find the value of \( n \) that makes the first term 1.

Here are the steps:

1. Start with the ratio \( 15 : 42 \).
2. To convert this to the form \( 1 : n \), divide both sides of the ratio by 15:
   \[
   \frac{15}{15} : \frac{42}{15} = 1 : \frac{42}{15}
   \]
3. Calculate \( \frac{42}{15} \):
   \[
   \frac{42}{15} = 2.8
   \]
   
So, the equivalent ratio in the form \( 1 : n \) is:
\[
1 : 2.8
\]

Would you like more details or have any questions?

Here are some related questions you might explore:

1. What is a ratio, and how does it compare to a fraction?
2. How do you simplify a ratio when given larger numbers?
3. How can ratios be expressed as percentages?
4. What are some practical applications of ratios in real life?
5. How can you convert a decimal ratio back to its original form?

**Tip:** When converting a ratio to the form \( 1 : n \), always divide both parts of the ratio by the first number to simplify it.

Rewrite the ratio 15 : 42 as an equivalent ratio of the form 1 : n. Give any decimals in your answer to 1 d.p.

Learn how to rewrite the ratio 15:42 as an equivalent ratio in the form 1:n. This guide will show how to calculate n to one decimal point. Suitable for middle school students (Grades 6-8).

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