recalling the idea of decimals, you'll have 1 on the tenths place and 7 on the hundredths place.
Rounding it off to the nearest tenths place:
notice that the number at the right of 1 is 7 and 7 is greater than 5 therefore you round it up then you'll have 65.2
Rounding it off to the nearest hundredths place:
at the right side of 7 is 8 and 8 is more than 5 then you round it up and you'll have 65.18