Iam part of a whole i am greater than three fourths but less than nine tenths i am a decimal with a 3 in my hundredths place what number am i ?

5/6 

as you can see, it is greater than 0.75 (3/4) and less than 0.9 (9/10)  The only fractions that are bigger than 3/4 and less than 9/10 are 4/5, 5/6, 7/8, 8/9
If we try all of them, 5/6 is the only one that has 3 in the hundredth place.

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The range would be 13 because you’re finding the difference