Numbers often play a vital role in UX copy, whether they're representing prices, dates, quantities, or other key information. When including numbers in your text, it's generally best to use numerals rather than spelling out the words for numbers. This approach has several advantages:

• Numerals are more scannable. They stand out in a block of text, grabbing the reader's attention, and allowing for quick and easy comprehension.
• Numerals save space. That’s true both in terms of characters and visual layout, which can be especially valuable in confined UI elements or mobile interfaces.
• Numerals reduce the chance of typos. They can even save time during the development phase of your project. Developers and translators may find it simpler to work with standardized numerical representations.