Tom makes $500 in a week. If his rent is $350, his bills are $75 and groceries are $45, what percent

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Tom makes $500 in a week. If his rent is $350, his bills are $75 and groceries are $45, what percentage of his money does he have leftover

Calculate leftover amount
Leftover amount = Weekly Salary - Rent - Bills - Groceries
Leftover amount = 500 - 350 - 75 - 45
Leftover amount = 30

Calculate leftover percentage
Leftover percentage = 100% * Leftover amount / Weekly Salary
Leftover percentage = 100% * 30 / 500
Leftover percentage = 100% * 0.06
Leftover percentage = 6%