Sarah found a wallet containing $500 in the street. She returned the wallet to its owner, who gave her a $30 reward. What percentage of the $500 was the reward?

To find the percentage of the reward compared to the total amount in the wallet, you can use the following formula:
Percentage = (Reward / Total amount) × 100
In this case, the reward is $30 and the total amount in the wallet is $500. Plugging these values into the formula, we get:
Percentage = (30 / 500) × 100
Calculating this, we find:
Percentage = (0.06) × 100 = 6%
Therefore, the reward of $30 is 6% of the total amount of $500.