Compare the digits in each place from left to right.
Start with the tens place.

The digits in the tens place are equal, so compare the digits in the ones place.

The digits in the ones place are equal, so compare the digits in the tenths place.

The digits in the tenths place are equal, so compare the digits in the hundredths place.

The digits in the hundredths place are equal, so compare the digits in the thousandths place.

Since 3 > 2, 89.073 > 89.072.