Find Percents

Find Percents

First, let's review writing decimals as percents and fractions.

Poll

 $How\ can\ I\ write\ \frac{3}{5}as\ a\ decimal?$  

•  $Divide\ in\ a\ calculator\ 3\div5=0.6$  

• Multiply the numerator and denominator by 20 to get 60/100. Sixty hundredths is 0.60

Multiple Choice

Write as a percent: 0.652

• 6.52%

• 65.2%

• 653%

Multiple Choice

Write 5.6 as a percent

• 5.6%

• 0.56%

• 56%

• 560%

Multiple Choice

Write 0.2% as a decimal

• 0.2

• 0.02

• 0.002

Multiple Choice

 $Write\ 2\ \frac{1}{2\ }\ as\ a\ decimal,\ then\ as\ a\ percent.$  

• 2.5, 25%

• 2.5, 250%

There are two ways to find percents

Use the equation. Remember, to change a percent to a decimal divide it by 100 (move decimal two places left).

OR: Use the Proportion

Remember, is over of equals % over 100.

Multiple Choice

What is 20% of 65?

• $part=65\times.2$

• $part\ =\ 65\ \times.02$

Multiple Choice

What is 20% of 150?

• 30

• 300

Multiple Choice

What is 20% of 250?

• 500

• 50

• 5

Poll

12 is what percent of 15?

• $\frac{12}{15}=\frac{x}{100}$

• $12=p\times15$

Multiple Choice

12 is what percent of 15?

• $\frac{12}{15}=0.8\ or\ 80\%$

• $\frac{12}{15}=0.8\ or\ 8\%$

Multiple Choice

14 people in the class of 30 students are taller than the teacher. What percent of students are taller? 

•  $\frac{14}{30}=\frac{x}{100}$  

•  $\frac{100}{13}=\frac{14}{x}$  

Multiple Choice

14 people in the class of 30 students are taller than the teacher. What percent of students are taller?

• 7%

• 14%

• 46.7%

• 50%

Multiple Choice

Sales tax is about 8% in NM. How would you find the tax of a $50 purchase?

•  $.8\times50$  

•  $.08\times50$  

Multiple Choice

Sales tax is about 8% in NM. Find the tax of a $50 purchase.

• $400

• 0.16

• $4

• 16%

Poll

I'd rather be a

Poll

I'd rather be a

Poll

When I think of math, I feel like this:

Poll

When Fractions Club is over, I feel like this: