It is already in decimal form.
6.2992
7.12
712 = 7.12*102
As 712 is ending by an even digit then it can be divided by 2 thus 712 is not prime
No, not evenly: 712 divided by 75 equals 9 with a remainder of 37.
.712
712.0
6.2992
35 712/1000 = 35.712
7 1/2 = 7.5
A decimal number is simply a way of representing a number in such a way that the place value of each digit is ten times that of the digit to its right. A decimal representation does not require a decimal point. So the required decimal representation is 712.
1226
It is 712 cents. If you wanted the number to be represented in other units - Euros, for example, you need to specify that.
712
The greatest factor of 712 is 712.
7.12
712 -14 = 698