To find out what number 51 is 85% of, you can set up the equation:
51 = 0.85 * X
Where X is the number you want to find. To solve for X, you need to isolate it on one side of the equation. You can do this by dividing both sides by 0.85:
X = 51 / 0.85
Now, if you calculate the right side:
X ≈ 60
Thus, 51 is 85% of 60. This means if you take 60 and calculate 85% of it, you will end up with 51.