Decimals, Percents, Fractions Flashcards
1/10
.1…10%
2/10…1/5
.2 20%
3/10
.3 30%
4/10
.4 40%
5/10..1/2
.5 50%
1/8
.125 12.5%
11/10
1.1…110%
12/10…6/5
1.2….120%
3/8
.375…37.5%
5/8
.625 62.5%
7/8
.875, 87.5%
10/8..5/4
1.25…125%
3/2
1.5 10%
62 divided by 10 to -2 power
6200
4,000000 x .0003
move decimal place four times to the right for to get 3 and move decimal place four places to the left to get 400
=400 x 3
300/.05
move decimals in the same direction on the top and bottom 30000/5 = 6,000
percent increase
To calculate the percentage increase: First: work out the difference (increase) between the two numbers you are comparing. Then: divide the increase by the original number and multiply the answer by 100. If your answer is a negative number then this is a percentage decrease.
New percent ( as % of original value)
new value/original value= 230/200
$230 is what percent more than $200
this is just like asking what the percent increase is = 40%
change in value/orginal value
30 is what percent more than 20
asking you to find the increase from 20 to 30
slope-intercept equation: y=mx + b
m= slope b=y
The distance between two points in the coordinate plane can be calculated by using the pythagorean theorem.
Fore example: points (1, 3) (7,-5)
side of traingle= 8 and 6
8 squared + 6 squared = c suqared
Draw the line represented by x-y=18
first rewrite the line in slope intercept form (y=x-18)
2nd fine the intercepts by setting x equal to 0 and y equal to 0.
- y=0-18 x=18
- (0,18) (18,0)
of all the quadrilaterals with a given area, the square has the minimum perimeter
Of all quadrilaterals with a given perimeter the square has the largest area