Exploring PercentConverting to decimal 23% = 23 รท 100 = 0.23 8% = 8 รท 100 = 0.08
18% = 018.0 move decimal two places left = 0.18 1% = 001.0 move decimal two places left = 0.01
• There are 2 ways to make a fraction into a percent Division and multiplication Find an equivalent fraction over 100
• A percent can be made a fraction in only one way
Exploring PercentHow are they related to fractions? Take your bottom number and divide into top then multiply the answer by 100 and round to a whole number Multiply the numerator and denominator by the same number so that the denominator equals 100. The numerator is the percent You take the percent and put it over 100. Reduce until it is in lowest terms
Eg. 23 =96% 24
Exploring Percent-mixed formats Rank these greatest to least
• Some times you may need to compare two or more formats. • The best solution is to convert them all to one easiest format, rank them then give the answer in the old format you started with.
15%
7 0.12 10 a) 15%= 15% b) 7 70 10= 100 =70% c) 0.12 = 0.12 x100= 12% Therefore greatest to least is 7 , 15%, 0.12 10
Exploring Intergers • Integers are numbers that are lower then 0. • They have 2 types: Negative integers to the left of zero (- in front) Positive integers to the right of zero (+ in front)
Zero is not negative or positive
Exploring Intergers • Temperature variance • Strategy? -if 2 negatives -just pretend the negatives are not there and subtract -if 2 positives -just pretend the positives are not there and subtract -if a negative and positivehow far are each from “0” then add the 2 differences.
Percentage grid 10x10 • Use this to shade in percent