We have a question: Clara is climbing to the top of a historical tower with stone stairs. Each level has eight huge steps in the stairs. Every step is made up of three massive blocks of stone. By the time she reaches the top, she has climbed past 96 blocks of stone. How many levels are there in the tower?
And an answer: 4
So how you got the answer?
Clara climbed past 96 / 3 = 32 steps made up of 3 blocks of stone each. At 8 steps per level, there are 32 / 8 = 4 levels in the tower.

We have a question: Carla's brush is 12 inches long. If Carmen's brush is 50% longer than Carla's brush, how long is Carmen's brush in centimeters? (There are 2.5 centimeters per inch.)
And an answer: 45
So how you got the answer?
First find the length of Carmen's brush in inches: 150% * 12 inches = 18 inches. Then convert the length from inches to centimeters: 18 inches * 2.5 centimeters / inch = 45 centimeters.

We have a question: On a 16 GB (gigabyte) capacity USB drive, 50% is already busy. Calculate the number of gigabytes still available.
And an answer: 8
So how you got the answer?
We calculate 50% of 16 GB:. 50 / 100 * 16 GB = 0.5 * 16 GB = 8 GB. That leaves 16 GB - 8 GB = 8 GB available on this key.