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I can't think of a single context in which "450's" would be correct usage for anything. Usually, other than denoting increments of dollar bills: ones, fives, 10s, and 20s, or perhaps in counting intervals: counting by twos, for example, you typically do not use the plurals of numbers. In those instances, you do not use an apostrophe. So (since there is no 450 dollar bill) if, for some obscure reason, you were going to count by 450 (ie: 450, 900, 1350, etc), you would say 450s, or Four-Hundred Fifties.
I suppose another reason would be discussing a decade of time. So if you were discussing the decade from 450 to 459 CE or BCE, that decade would be called the 450s, or Four-Hundred Fifties, but would be more usually referred to without the "hundred" and more commonly just called the Four Fifties.
Apostrophes are used to denote either a contraction or possession. 450s is not a contraction of any longer words. And a number cannot be in possession of anything. Thus 450's should never be correct.
I can't think of a single context in which "450's" would be correct usage for anything. Usually, other than denoting increments of dollar bills: ones, fives, 10s, and 20s, or perhaps in counting intervals: counting by twos, for example, you typically do not use the plurals of numbers. In those instances, you do not use an apostrophe. So (since there is no 450 dollar bill) if, for some obscure reason, you were going to count by 450 (ie: 450, 900, 1350, etc), you would say 450s, or Four-Hundred Fifties.
I suppose another reason would be discussing a decade of time. So if you were discussing the decade from 450 to 459 CE or BCE, that decade would be called the 450s, or Four-Hundred Fifties, but would be more usually referred to without the "hundred" and more commonly just called the Four Fifties.
Apostrophes are used to denote either a contraction or possession. 450s is not a contraction of any longer words. And a number cannot be in possession of anything. Thus 450's should never be correct.
I assumed the OP was referring to the time period around 450 C.E., kind of like how we talk about the 1960's.
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A question about Luke, chapter 4, verse 25-28.
