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21 March, 16:42

How can you quickly calculate 20 percent of any bill amount?

A. Round the amount to the nearest $10, remove the zero in the ones place, and add half the resulting amount.

B. Round the amount to the nearest $10, remove the zero in the ones place, and halve the resulting amount.

C. Round the amount to the nearest $10, remove the zero in the ones place, and double the resulting amount.

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Answers (2)
  1. 21 March, 16:55
    0
    The answer is C an example is 20% of $20 is 4, so you would lose the zero and double the 2 to get 4
  2. 21 March, 17:11
    0
    C. Round the amount to the nearest $10, remove the zero in the ones place, and double the resulting amount.

    Step-by-step explanation:

    The percentage is quite present in our day to day, but still generates doubt and confusion at the time of doing the accounts. We use percentages to calculate discounts offered at stores, interest rates on financing, profits obtained from the sale of a particular product, etc.

    An easy way to quickly calculate 20% of any invoice value is what is described in letter C.

    For example: 20% of 100 dollars is 20 dollars. To calculate this quickly, you must remove the last zero from the number 100 and multiply the remainder by 2.

    Removing the last zero from the number 100 will result in the number 10. Multiplying the number 10 by 2, the result will be 20. Thus, one can conclude that the 20% of 100 $ is 20 $.
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