Question

Can you write 0.02 in tenths

Answer 1

First you see how many zeroes there are. 2 right, now, which number has two zeroes? 100 has 2 zeroes so that definitely fits. So, you put 2 as the numerator and 100 as the denominator and that is how you convert it.

Answer 2

In order to answer your question AND dissapoint you... :P
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It is impossible to write 0.02 in tenths.
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Let's review. 
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Let's say we have decimal 0.123.
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In decimal format...
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1 is the tenths place.
2 is the hundredths place.
3 is the thousandths place.
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And so on.
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So... unfortunately, you cannot write 0.02 in tenths.