Percent of a Number 2.7p. 147 15 30 We created equivalent ratios.By doubling the 100 to 200, we just had to double the first terms in each of the ratios. 30 17 34 34 15 30 30 18 36 36 12 24 24 Snack Ratio/100 ? / 200 Fruit 23 Cheese 15 Veggies 17 Cookies Chips 18 No snack 22 Total 100 200 46 30 34 36 44 ( x2) In this ratio tables, instead of using the % sign, you see the total of 100 is used. = = Lets talk about the values represented on this bar.
10% of 300?? 30 Half of this???? 15 15% = 10% + 5% 18% of 300 = .18(300) = 54 (3) (3) = Which number represented the part? Which number represented the whole? Percents greater than 100 or less than 1
145% of % of % of 58 1.45(320) = 2.20(65) = .0025 (58) = .145 464 143 Which number represented the part? Which number represented the whole? Which number represented the part?
Which number represented the whole? 145%= ? 100% of 320 would be 320. More than 100% of a number will be greater than the number. 29 2 (10) 32 (10) 1 29(16) 1 145% 320= =464 11 5 = =11 5 13 1 11 5 65 Which number represented the part? Which number represented the whole? 143 143 x 600 =n 1.28 x 550 =n .003x 200 =n = 5.1 = 704 = .6 Which numbers represented the parts? Which numbers represented the whole? Which numbers represented the parts?
The decimal multiplication method is the best for these values. 1.28 x 550 =n x 600 =n .003x 200 =n = 5.1 = 704 = .6 Which numbers represented the parts? Which numbers represented the whole? 20%, or 1/5 of the 70 players competed in soccer.What is 1/5 of 70? What is 15% of 20? .15 x 20 = ?? = 3 students
Which number represented the part? Which number represented the whole? .32 x 60 = x 220 = x 4 = 19.2 1.21 11 32(60) 100 Can anyone think of this in a different way? 32(6) 10 = = Which number represented the part? Which number represented the whole? There are several ways, but they one you will use most often is:
Write the percent as a decimal Multiply the decimal (part)by the other number (whole) to find the missing part.