Andrea wanted to calculate 5% of 300, so she multiplied 300 by 0.5 (300 x 0.5).
Explain why this equation will not produce the correct answer and what Andrea should have done to get the correct answer. Demonstrate a second strategy to calculate 5% of 300, using your knowledge of how to quickly find 10% of a number

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14-03-2015
Mathematics

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Andrea wanted to calculate 5% of 300, so she multiplied 300 by 0.5 (300 x 0.5).
Explain why this equation will not produce the correct answer and what Andrea should have done to get the correct answer. Demonstrate a second strategy to calculate 5% of 300, using your knowledge of how to quickly find 10% of a number

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eternal3fear eternal3fear · Answer 1 · 2015-03-14T17:14:06-04:00

eternal3fear eternal3fear

14-03-2015

this is because Andrea converted the Percentage wrong.
to Convert a Percent to a Decimal, she should have divided by 100
so 5 divided by 100 = 0.05 [not 0.5]
Andrea should have multiplied 300 by 0.05 instead to get the right answer

quickly finding 10% of a number means to simply move the decimal to the left one place
so 10% of 300 is 30

since 5% is half of 10%
half of 30 is 15

and so 5% of 300 is 15

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