We have been learning how to round numbers here is an example on how to do it.
0.23 is the number. You have to round the 3 and since it is below 5 you round down so the end answer 0.2.
72.47 since the 7 is higher than 5 you round up so it would be 72.5.
99.12 since 2 is lower than 5 you round down and that would make it 99.1.