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The easiest and simplest way to calculate a percentage of any number is to remember that 10% of any number, is the number itself with the decimal point one place to the left.

  • I.e 10% of 1478 is 147.8 (The decimal one place to the left)
  • 10% of 100,000,000 is 10,000,000.

That means that 10% of 80.00 is 8.000 (keeping the insignificant digits). So 20% would be $16.00. But we need 5 percent more, so we just split our 10% in half. Half of 8 is 4. So 25% of 80.00 is 16 + 4 which is 20.
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Wiki User

9y ago

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More answers

We can use a proportion to find it out.

x/80=25/100

We want to find x. We can use the Cross Product Property here.

100*x=25*80

100x=2000

100x/100=2000/100

x=20

So, 25% of 80 is 20.

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Wiki User

9y ago
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25% of 8000
= 25% * 8000
= 0.25 * 8000
= 2000

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Wiki User

12y ago
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200

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Wiki User

6y ago
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20%

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Norma Webb

Lvl 5
3y ago
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20

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Anonymous

4y ago
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Q: What is 2.5 percent of 8000?
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