Final answer:
To find 9% of a number, you can multiply that number by 9/100. 9% of 90 is equal to 8.1.
Step-by-step explanation:
To find 9% of a number, you can multiply that number by 9/100. Let's call the number we are looking for x. So, the equation becomes: 9/100 * x = 8.1. To solve for x, we can divide both sides of the equation by 9/100. This gives us x = 8.1 / (9/100), which simplifies to x = 8.1 * 100 / 9.
Now, we can calculate the value of x: x = 8.1 * 100 / 9 = 90. Therefore, 9% of 90 is equal to 8.1.
Learn more about Finding percentages