Friday, January 4

Today we begin to find the percent of a given number.

for example 30% of 40 is 12
** here are the notes the students were given and the video they watched

Percents are fractions.

Percents are decimals.

So, to find the percent of a number we can convert the percent into a fraction or decimal and multiply.

60% of 35

60 % x 35

  

The students were instructed 3 ways and are permitted to chose the way the want to use.

Method 1:

Convert % to a fraction, then Multiply!

 60% of 35

 60% = 60/100- 6/10= 3/5

3/5 x 35/1 = 105/5 = 21

Method 2:

Convert % to a decimal, then Multiply!

40% of 22

40% = 0.4

0.4 x 22 = 8.8  

 VIDEO we viewed!!

http://www.youtube.com/watch?v=2rr-IXInEVc

Method 3:

Set of equivalent fractions/proportion and CROSS MULTIPLY!

12% of 45

x/45 = 12/100