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Mathematics 19 Online
OpenStudy (anonymous):

5/7-2/9 = what

OpenStudy (anonymous):

.49

OpenStudy (cwrw238):

first find the LCM of 7 and 9 so that you can rewrite the fractions with the same denominator

OpenStudy (anonymous):

give me a sec ok

OpenStudy (anonymous):

0.301

OpenStudy (cwrw238):

the LCM of 7 and 9 is 7*9 = 63

OpenStudy (anonymous):

31/63=.49

OpenStudy (cwrw238):

guys - please dont just give the answer This site is meant for members to demonstrate the methods used to solve questions

OpenStudy (anonymous):

k srry

OpenStudy (cwrw238):

we need to show efair how to do the problem

OpenStudy (anonymous):

where did you get that number??

OpenStudy (cwrw238):

ok so 5 / 7 = 5 * 9 / 63 = 45/63 and 2/9 = 2*7 / 63 = 14/63 now we can subtract 45/63 - 14 / 63 = 31/63

OpenStudy (cwrw238):

you don'y really need to convert it too a decimal

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