A percent means out of 100.
Ex: 50% means 50/100, 50 out of 100, or 0.50
Representing percents means showing a percent as a picture in a hundred grid.
Ex. 50% on a hundred, 50 squares are shaded in a hundred grid so it would be 50%.
4.2 Fraction,Decimal,and Percents
Fractions,decimals, and percents can be used to represent numbers in various situations
-Percents can be written as fractions and as decimals.
Ex. 1/2%=0.50%, 0.5/1000=o.005, 150%=150/100=1.5 or 1 1/2
4.3 Percent of a number
-You can use mental math strategies such as halving,doubling, and dividing by ten to find the percents of some numbers.
-To calculate the percent of a number,write the percent as a decimal and then multiply by the number.
Ex. 12 1/2% of 50=0.125 x 50=6.25 ( 12 1/2 %=12.5%=0.125)
4.4 Combining Percent
-Percent can be combined by adding to solve problems. 5% + 7%=12%
-To calculate the increase in a number.
Ex. 12% of 100= 0.12 x 100=12,100 + 12=112
-You can multiply the original number by a single percent greater than 100
Ex. 112% of 100=112 x 100 = 112
Percent of percents can be used to determine amounts that result from consecutive increases or decreases.
This is my percent preview video: