Your answer would be 9.6
.6 is a six tenths.
To help you remember to round up or down remember this rhyme: 5 or more raise the score. 4 or less give it a rest.
9.64 is rounded to the nearest hundredth. To get to the nearest tenth you need to get rid of the four. Since it's less than 5, you just knock it away like it wasn't ever there. If it's 5 or above, you would have to round the number up. If you had to round up it'd be 9.7.