DATABASE FUNDAMENTALS
TYPES OF DATA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In a 30% sale a jumper now costs $40. What did it cost originally?
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$50.50
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$52.37
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$55.60
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$57.14
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Explanation:
Detailed explanation-1: -Therefore, to find 30% of 40, we move the decimal in 30 two units to the left to get 0.30, and then we multiply 0.30 by 40. We get that 30% of 40 is 12.
Detailed explanation-2: -Original Price Formula To calculate the original price of an item, divide the sale price by the value of 1 minus the value of the percentage off divided by 100.
Detailed explanation-3: -Reverse percentages (or inverse percentages) means working backwards to find an original amount, given a percentage of that amount. We can do this using a calculator by taking the percentage we have been given, dividing to find 1% and then multiplying by 100 to find 100% .
There is 1 question to complete.