Question

Is 2.9 greater than 2.90

Answer 1

no they are equal because the zero is just there to just to be you can add how many zeros you want it will still be 2.9

or equal to it

Answer 2

No they are equal to eachother 
 after the decimal you can add all the zeros you would like for example you could have 3.80000000000 and it would be = to 3.8