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January 28, 2015

January 28, 2015

Posted by **Dell** on Thursday, December 1, 2011 at 11:29am.

a.What is the ratio of blue buttons to purple buttons at the beginning of the year?

b.After Marnie adds another 200 buttons –some red and some blue – at the end of the year, the number of red buttons increased by 75% and the number of blue buttons increased by two-thirds.

i.What is the new ratio of red buttons to blue buttons?

ii.Express the number of purple buttons as a fraction of the new total number of buttons.

iii.Express the number of blue buttons as a percentage of the number of red buttons. (Round to one decimal place).

- math -
**Steve**, Thursday, December 1, 2011 at 12:38pmso, we have red:blue:purple = 4:3:2

4+3+2=9, so there are 360/9 buttone for each proportion:

160 red

120 blue

80 purple

b:p = 3:2

after new buttons, we have

red: 160 (1.75) = 280

blue: 120(5/3) = 200

purple: 80

r:b = 280:200 = 7:5

p/all = 80/560 = 1/7

b/r = 200/280 = 5/7 = 71.4%

- math -
**Anonymous**, Monday, December 5, 2011 at 10:33amI'm confused on where you got the 1.75 and the 5/3????

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