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I have a pie chart with a total of 60 people. One type is 42 percent. How many people are there?

Guest May 7, 2015

Best Answer 

 #2
avatar+79 
+10

In order to calculate based on percentage you need to know how decimals and percentages work.

For example if you've got a whole apple that is 100% of an apple.

If you've got half an apple, 50%, that is 0.5 apples.

You simply divide the percentage by 100 to get the decimal.

100%: 100/100=1
42%: 42/100=0.42

If you have 60 people as you say, and you want to know how many 42% of them are, you simply take the total amount times the decimal.

In this case, the way you solve it would be: 

$${\frac{{\mathtt{42}}}{{\mathtt{100}}}} = {\mathtt{0.42}}$$

$${\mathtt{60}}{\mathtt{\,\times\,}}{\mathtt{0.42}} = {\mathtt{25.2}}$$

And as the previous answer mentioned, you can't have decimals in the answer when talking about number of people, so you round it to the closest whole number: 25.

Squaddy  May 7, 2015
 #1
avatar+1191 
+10

60 times 42% is 25.2, but since there can't be a decimal number of people, the answer is 25 people.

DarkBlaze347  May 7, 2015
 #2
avatar+79 
+10
Best Answer

In order to calculate based on percentage you need to know how decimals and percentages work.

For example if you've got a whole apple that is 100% of an apple.

If you've got half an apple, 50%, that is 0.5 apples.

You simply divide the percentage by 100 to get the decimal.

100%: 100/100=1
42%: 42/100=0.42

If you have 60 people as you say, and you want to know how many 42% of them are, you simply take the total amount times the decimal.

In this case, the way you solve it would be: 

$${\frac{{\mathtt{42}}}{{\mathtt{100}}}} = {\mathtt{0.42}}$$

$${\mathtt{60}}{\mathtt{\,\times\,}}{\mathtt{0.42}} = {\mathtt{25.2}}$$

And as the previous answer mentioned, you can't have decimals in the answer when talking about number of people, so you round it to the closest whole number: 25.

Squaddy  May 7, 2015
 #3
avatar+86859 
0

Nice answers, DarkBlaze347  and Squaddy   ......!!!!!

 

 

  

CPhill  May 7, 2015

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