Generally, spell out the numbers one through nine; use digits for 10 and above.
U.S. President Obama has two daughters.
President John Tyler had 15 children.
He had four children, 11 grandchildren and 27 great-grandchildren.
Spell out:
Numbers that begin a sentence, except for years:
Twelve of his children survived until adulthood.
1992 was a good year.
Millions, billions, trillions: 100 million, 4.3 billion, 2 trillion
Use U.S. billions: 1 billion = 1,000 million
Use digits for:
Addresses: 1000 Main Street
Ages: 37 years ago, the 12-year-old girl
Decimals, fractions and percentages higher than one:
Only 8 percent of Venezuelans between the ages of 18 and 29 are happy with the country’s current condition.
French voter turnout is expected to increase by 3.2 percent in 2016.
Dimensions: He lives 3 miles south of the airport.
Monetary Units: 11 euros, $13, 4 cents
Speeds: 60 mph, 100 km/h
Temperatures: The temperature on Christmas was 10 degrees higher than average.
Exception:
Always spell out zero.