Hi There!
This number written as a decimal is 3.45 . Please note, whenever a fraction has a denominator of 100 and a positive numerator, then the numerator will be the decimal.
Steps
1.

= 0.45
2. 3 is the whole number.
3. 3

= 2/45
In conclusion, 3

written as a decimal is 3.45
Hope this helps Jorge :)
The correct answer should be an Atlas.
Atlases are huge books filled with maps, most commonly political and geopolitical maps.
Explanation:
I have send in photo at above. you can take look on that.
the numbers 123 on photo is siconce. I have sent 3 page of easy. I am sure it will helps you 100percent