Final answer:
Judit spent 90% of her money. By dividing the amount spent by the original amount and multiplying by 100, we calculate the percentage of money used on her shopping trip.
Step-by-step explanation:
To find out what percentage of her money Judit spent, we must first calculate the proportion of money spent to the original amount. Judit started with $50 and spent $45.
The formula to calculate the percentage is:
Percentage Spent = (Amount Spent / Original Amount) × 100%
Plugging in the values we get:
Percentage Spent = ($45 / $50) × 100%
Percentage Spent = 0.9 × 100%
Percentage Spent = 90%
Therefore, Judit spent 90% of her money.