Percents are numbers expressing parts of :  means  part of , or . 

The simplest way to convert a decimal to a percentage is to move the decimal place over two places to the right. We move the decimal point to after the hundredths place because we are rewriting the decimal as a portion of . Therefore:

Now, we need to round the percentage to the nearest tenth. The number after the tenths place is a five, so we need to round up:

 is therefore our final answer.

Percents are numbers expressing parts of :  is the same thing as saying  parts of  or 

The simplest way to convert a decimal to a percentage is to move the decimal place over two places to the right. We move the decimal point to after the hundredths place because we are rewriting the decimal as a portion of . Therefore:

In everyday usage, percents usually are between  and . However, when a number is greater than , it's corresponding percentage is going to be greater than . The next step of this problem is to round the percentage we have to the nearest hundredth. The number in the thousandths place is , therefore, we're going to round up:

 is therefore our final answer.

To change a percent to a decimal, drop the "%" sign then divide by 100.

To change a percent by the decimal, first drop the percent sign.

Then, divide the number by 100.

To convert a percent into a decimal, divide the percent by 100 or move the decimal point 2 places to the left.

 or 68 hundredths.

To convert a percent to a decimal, divide the percent by 100 or move the decimal point two places to the left.

The question is in regards to the amount of non-red shirts. If one of the three shirts is red, then two are not red. We represent this as a fraction:

In order to convert it into a percent, we carry out the division and multiply the result by 100:

We want to round to the nearest tenth, which is the number directly to the right of the decimal point. The number in the next spot over, the hundredths place, is six, so we round the tenths spot up to seven. This gives us a final answer of 66.7%.

Percentages are numbers represented as parts of .  therefore means  parts of . To get the corresponding decimal, we need to divide by  (which can be done by moving the decimal point two places to the left) and remove the percentage sign. Thus we obtain:

Our final answer is .

If  of the students are wearing blue then that means  of them are not wearing blue. Because,

Now to find the percentage we divide the number of students not wearing blue, by the total number of students in the class and then multiply by .

Thus,

The correct answer is 20%. This can be obtained by first converting the fraction  to a decimal and then multiplying by 100 to get a percentage.