Using Numbers in Writing: Tips for Your Print Marketing  Writing
is primarily thought of as a process involving letters and
words, so when print marketers are tasked to write numbers and
quantities, they might spell out the number (like “twelve” or
“five percent”) instead of using a numeral (“12,” “5%”). The
thought process is easy to understand–numerals are commonly
associated with math and science, so many marketing writers may
think they have no business in copywriting.  Various Numerals in
Writing  Numerals are often used in various media because they
attract attention and take up less space than words. Photo
Credit: James Cridland  However, numerals can be a great boon to
your business writing. When used correctly, they may actually
attract 10-20% more readers than an article that uses only
letters. Whether you’re writing for a catalog, brochure, sell
sheet or other print media, it definitely helps to know how to
use numbers to your advantage.  5 Reasons to write out numbers
1. They attract readers