Answer:
12,300
Step-by-step explanation:
To round to the nearest hundred look at the tens place and if the number is a 5 or above add 1 to the hundreds place, in this case though the number is below 5 so you drop all the numbers behind it and nothing happens to the hundreds place
12,(3)46.6789
this is the hundreds place
12,3[4]6.6789
go to the tenths place and since the number is a 4 you drop it and the other numbers behind it.
Giving you the answer 12,300