How to Use Numbers Effectively in Writing
Always keep the format clear, such as “(555) 123-4567” or “555-123-4567” when including credit card or contact details.
Example: “Never give out your credit card number over the phone.”
Numbers are an essential part of communication. Whether you’re writing a report, sending an invoice, or drafting an essay, numbers help convey clear and precise information. Here’s a guide to help you use numbers effectively in your writing.
When to Use Numbers as Words or Digits

- Write out numbers from one to nine in words (e.g., “Think of a number between one and nine”).
- Use digits for numbers 10 and above (e.g., “There are 15 students in the class”).
- For large numbers, combine words and digits (e.g., “5 million residents”).
Read More: Which of the Following Sentences Contains an Oxymoron?
Formatting Tips
- Phone Numbers
Always keep the format clear, such as “(555) 123-4567” or “555-123-4567” when including credit card or contact details.
Example: “Never give out your credit card number over the phone.”
- Lists or Sequences
Use numbers to order items or provide clear instructions, such as “Step 1, Step 2.”
Example: “Each page is neatly numbered in the top corner of the document.”
- Statistics and Percentages
Use numbers to convey precise data and trends easily in sentences, especially for analytics reports.
Example: “The team achieved a 25% increase in sales revenue.”
- Dates & Time
Simplify timelines with numerical date formats (e.g., “April 15, 2023” or “10 AM”).
Example Applications for Numbers
- Expressing Quantities Clearly:
Use numbers to emphasize quantity or size with clarity. Example from a budget breakdown or example-style story structure.