In jeffrey's class,30% of the students are wearing blue shirts 1/4 of the students are wearing green shirts, 0.15 of the students are wearing red shirts and the rest are wearing white shirts. write the percents, fraction, and decimal for each color shirt.
blue:
green:
red:
white:

The whole point of this problem is just to give you some practice in
converting numbers between percents, fractions, and decimals.

Here are all the tools you need:

-- Fraction to decimal:   Do the division ... (top) divided by (bottom)

-- Decimal to percent:   Multiply by 100. Move the point 2 places that way ==>.

-- Percent to decimal:   Divide by 100.  Move the point 2 places this way <== .


Blue:  30%
Change the percent to a decimal:    30%  =  0.30
Read the fraction out loud:  "thirty hundredths".
Write it down:          30/100 .
Simplify it:                  3/10

Green:  1/4
Do the division:                                '1' divided by '4' = 0.25
Change the decimal to a percent:        0.25 = 25%

Red:  0.15
Change the decimal to a percent:      0.15 = 15%
Read the fraction:  "15 hundredths"
Write it down:               15/100
Simplify it:                        3/20

White:  ? ?
White shirts are worn by "the rest".
How can we find out how many "the rest" are ?
The easiest way: Use what we know about the others:

... Blue . . . .  30%
... Green . . . 25%
... Red . . . . . 15%
Total . . . . . . . 70%

How many percent make the WHOLE of anything ?  ==>  100% .
How many kids are wearing blue, green, or red ?                 70% of the class
How many percent are left for the kids wearing white ?        30% = "the rest"

30% of the class is wearing white shirts.  They are "the rest".

Notice that this is the same percent as the kids wearing blue shirts.
So the numbers for white shirts are all the same as for blue shirts.

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle