Look at the hundred-thousands place.
It is the 6th place left of the decimal point and has a 5 in it.
All digits to the right of the 5 will become zero.
If the first digit to the right of the 5 is 5 through 9, the 5 goes up 1 to 6.
In this case, the first digit to the right of 5 is a 2, so the 5 remains as 5.
Answer: 7,500,000