When is "one hundred" used and when do we say "a hundred"?
"one hundred" and "a hundred" 100
"One hundred" is used when writing checks, and perhaps in other formal situations. "A hundred" if often used otherwise.
"This the biggest flood in a hundred years."
"Given that the US Senate has exactly one hundred members, percentages are easy to calculate."
"This the biggest flood in a hundred years."
"Given that the US Senate has exactly one hundred members, percentages are easy to calculate."