Advanced - Percents Review

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What is a percent?

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A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

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How do you calculate a percentage of a number?

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To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 20% of 50, calculate 50 * 0.20 = 10.

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What is a tip in terms of percentages?

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A tip is an additional amount of money given to service workers, typically calculated as a percentage of the total bill.

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How do you find the total cost after adding a tip?

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To find the total cost after adding a tip, calculate the tip amount and then add it to the original bill. For example, if the bill is $50 and the tip is 20%, the tip is $10, making the total $60.

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What does it mean to raise a percentage of money?

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Raising a percentage of money means to collect or earn a specific portion of the total amount needed, often calculated as a percentage.

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How do you calculate commission?

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Commission is calculated by multiplying the total sales amount by the commission rate (in decimal form). For example, if the sales are $1,000 and the commission rate is 5%, the commission is $1,000 * 0.05 = $50.

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What is a discount?

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A discount is a reduction in the price of an item, often expressed as a percentage of the original price.

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How do you calculate the percent discount?

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To calculate the percent discount, subtract the sale price from the original price, divide by the original price, and multiply by 100. For example, if an item costs $100 and is on sale for $80, the discount is (($100 - $80) / $100) * 100 = 20%.

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What does it mean to increase a number by a percentage?

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To increase a number by a percentage means to add that percentage of the number to the original number. For example, increasing 100 by 20% means adding 20 (which is 20% of 100) to get 120.

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How do you calculate the number of items after a percentage increase?

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To calculate the number of items after a percentage increase, multiply the original number by (1 + percentage increase in decimal form). For example, if there are 100 trees and they increase by 45%, the new total is 100 * (1 + 0.45) = 145.