Questions: Last year, a French restaurant used 540,390 ounces of cream. This year, due to a menu update, the restaurant used 54,039 ounces of cream. By what percentage did the restaurant's annual cream usage decrease?

Solution Steps

The initial amount of cream used last year was \( 540{,}390 \) ounces. This year, the restaurant used \( 54{,}039 \) ounces of cream.

The decrease in cream usage is: \[ 540{,}390 - 54{,}039 = 486{,}351 \text{ ounces}. \]

The percentage decrease is calculated using the formula: \[ \text{Percentage Decrease} = \left( \frac{\text{Decrease}}{\text{Initial Amount}} \right) \times 100. \] Substituting the values: \[ \text{Percentage Decrease} = \left( \frac{486{,}351}{540{,}390} \right) \times 100. \] \[ \text{Percentage Decrease} = 0.9000 \times 100 = 90.00\%. \]

Final Answer