3.7. Always look to the digit one to the right of the digit that you're rounding to. So if you're rounding to the nearest tenth, you look to the digit in the hundredths location. If that digit is 5 or more, round the tenths place up one more, but it's 4 or less, just drop that number, and leave the tenths place as is.
I hope this helps you, Have a nice day.