Exactly as in the question: 3
You could add a decimal point after the number but it would be inappropriate to write 3.0 since that would imply a greater degree of precision.
It looks like 3 cents - exactly as in the question! A decimal representation does not imply a change in the measurement units. If this is required then you need to specify the units into which the quantity is to be converted.
.
a Decimal.
It is already a decimal in the form of 78.5
A decimal looks like this 0.16 however it can be any number at the end.
0.000000001
0.33
2 or 2.0
100,000,000.0
10 or 10.0
2,000,000,000
3.1415926 . . .
3/4 is 0.75 as a decimal
No a repeating decimal is a decimal like 2/3, which is .6666666666 and so on.
If there is a line over a decimal, it means the decimal is repetitive. If you are typing it would look like this... .7
You first look at the third decimal place. In this case it is 7. Then you look at the decimal place after that (the 4th one) and if it larger or equal to 5, then you round up. If it is 4 or smaller, then you leave it be. So in this one 55.06756 = 55.068 to 3 decimal places.
2.25