Find the difference of 99 and 48.

To find the difference between 99 and 48, you perform the subtraction operation: 99 - 48. When you calculate this, you start by aligning the numbers vertically, focusing on each column from the right:

1. The ones place: 9 (from 99) minus 8 (from 48) is 1.

2. The tens place: 9 (from 99) minus 4 (from 48) is 5.

Putting those results together, you get 51. Thus, the difference between 99 and 48 is 51, making this the correct answer. This reflects a straightforward application of basic subtraction, where the goal is to determine how much greater one number is than another.