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Assuming by "hundredth" you mean 1/100 = 0.01.

The answer is..

Before I tell you, i will tell you a trick. unlike many other "tricks" that have exceptions, This one works for all numbers in the form a.bc where a, b, c are natural numbers (1, 2, 3, ...)

So, the trick is. Look at 0.01 as 1. As simple as 1.

And then look at a.bc as abc. In this case, 309.

How many 1s are there in 309? obvious, 309.

It works the same when you are operating with them, just you must remember to added the decimal back in. To do that, it's a different discussion.

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13y ago
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Q: How many hundredths are there in 3.09?
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