Answer:
2.1758
Step-by-step explanation:
Millionth is the fourth decimal unit. 0. 0 0 0 1
In the number 2.17575968717, the millionth place is 2.175 7 5968717
Check the number next to it. If it's 5 or more then add the underlined number by 1. If not then leave it as it is.
Here,
175 7 5
5 is following 7 and 5 is considered more so add 1 to 7.
175 8
Then put zeros (or not) following 8.
2.1758000000