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jimthompson5910 (jim_thompson5910):
are you able to convert `2 1/2` to an improper fraction?
OpenStudy (kaloemalia):
yes
OpenStudy (kaloemalia):
I did that
jimthompson5910 (jim_thompson5910):
what is `2 1/2` equal to
OpenStudy (kaloemalia):
5/2
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jimthompson5910 (jim_thompson5910):
good
jimthompson5910 (jim_thompson5910):
so you really have 5/2 times 8/9
OpenStudy (kaloemalia):
yes.
jimthompson5910 (jim_thompson5910):
multiply straight across (the numerators pair up and multiply; so do the denominators)
jimthompson5910 (jim_thompson5910):
after multiplying, reduce as much as possible
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OpenStudy (kaloemalia):
40/18? then reduce right?
jimthompson5910 (jim_thompson5910):
correct
OpenStudy (kaloemalia):
20/9
jimthompson5910 (jim_thompson5910):
very good
jimthompson5910 (jim_thompson5910):
optionally you can convert that result to a mixed number
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OpenStudy (kaloemalia):
but when i tried to turn back into a mixed number but it is a never ending 2.2222222222
jimthompson5910 (jim_thompson5910):
break that decimal into 2 parts
the whole part which is 2 (left of the decimal)
the fractional part which is 0.2222 repeating (right of the decimal)
jimthompson5910 (jim_thompson5910):
the decimal part 0.2222 gets multiplied with the denominator of 9 to get roughly 0.22222*9 = 1.99998 which is effectively 2 (there's a bit of rounding error)
so
2.222222... = 2 2/9
jimthompson5910 (jim_thompson5910):
if you had something like 3.2222222..., then
3.2222222... = 3 2/9
or if you had 7.2222222..., then
7.2222222... = 7 2/9
and so on
jimthompson5910 (jim_thompson5910):
or you can think of it like this
\[\Large \frac{20}{9} = \color{red}{2} \text{ remainder } \color{blue}{2}\]
\[\Large \frac{20}{9} = \color{red}{2} \frac{\color{blue}{2}}{9}\]
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