Final answer:
Percy sprinkles 2 1/3 cups of powdered sugar on the brownies. This is derived by multiplying the total amount of sugar he has (3 1/2 cups) by the fraction he uses on the brownies (2/3).
Step-by-step explanation:
The question relates to fractions and requires you to find out how much sugar Percy sprinkles onto a plate of brownies. Percy has 3 1/2 cups of powdered sugar and sprinkles 2/3 of it onto the brownies. To find out how much sugar he uses, you have to multiply 3 1/2 by 2/3.
Firstly, 3 1/2 should be converted into an improper fraction. This equates to 7/2. Then multiply 7/2 by 2/3. The multiplication of fractions involves multiplying the numerators (top numbers) together and the denominators (bottom numbers) together. (7 * 2) / (2 * 3) simplifies to 14/6. By simplifying this, we get the value 7/3, which is 2 1/3 cups. So, Percy sprinkles 2 1/3 cups of powdered sugar on the brownies.
Learn more about Fraction Multiplication