The nearest tenth means the first number after the decimal.
If you are to round off to the tenth, it will be based on the second number after the decimal. If the second number after the decimal is anything 5 and above, the tenth should increase by 1.
The correct answer here is therefore: 43.55.
The second number after the decimal is 5 which will mean that the tenth number has to increase by 1 to 6. The number will then become: 43.6 .
