You wouldn't. That's a whole number.
Chat with our AI personalities
15.6 is a decimal
156/200 = 0.78
1.56
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 156, exactly as in the question.
It is not possible to give a sensible answer to the question since you have not stated the inits for 342 and 156. There number of square feet in 342 inches x 156 inches will be quite different from that in 342 miles x 156 miles!