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Mathematics 26 Online
OpenStudy (anonymous):

The Waltzer's average phone bill increased from $13.30 to $15.96. What is the percent of increase?

OpenStudy (amistre64):

15.96 - 13.30 ------------- 13.30

OpenStudy (amistre64):

the difference between the bills -------------------------- what the bill used to be

OpenStudy (anonymous):

.2 ?

OpenStudy (amistre64):

gonna make me get a calculator arent you :) or i could just google it ;)

OpenStudy (anonymous):

lol , sorry :)

OpenStudy (amistre64):

.2 is the decimal representation of 20/100 which means we have 20% increase

OpenStudy (anonymous):

can you help me w. one more ?

OpenStudy (amistre64):

maybe :)

OpenStudy (anonymous):

Jason is 48% short of a goal he made for the week. His goal is to earn $375. For each CD player he sells, he earns $45. How many CD players does he need to sell to meet his goal ?

OpenStudy (amistre64):

45 times what = 375? tells us how many he needs to sell to reach his goal right?

OpenStudy (amistre64):

375/45 = number need to sell

OpenStudy (amistre64):

he needs to sell 8.3 which is a rediculous number... so 8 is not enough, so he has to sell 9 of them right?

OpenStudy (anonymous):

yeah.

OpenStudy (amistre64):

375(.48) tells us how much hes short....

OpenStudy (anonymous):

Ok ..

OpenStudy (amistre64):

the kids 180 short of his goal... how many cds does he need to sell to make $180 ? 180/45 right?

OpenStudy (anonymous):

right .

OpenStudy (amistre64):

180/45 = 4 more cds to reach his goal

OpenStudy (anonymous):

thanks :)

OpenStudy (amistre64):

i knew i could do it lol

OpenStudy (anonymous):

me too ;)

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