Posted by **matt** on Thursday, November 21, 2013 at 9:50am.

please help someone explain this please!!

The length of a marathon is 138,435 ft.each stride,or step,by a particular runner is 3 ft long.does the number of strides the runner takes fit evenly into the length of the race?(EXPLAIN ANSWER PLEASE)

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IS 38/53 in simplest form?explain to me why or why not???(oh and i think it is in simplest form)

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- math(help) -
**Reiny**, Thursday, November 21, 2013 at 11:04am
Why didn't they just ask, " Is 138435 evenly divisible by 3 ? "

yes it is.

is 38/53 in lowest terms?

yes it is, since no whole number divides into both 38 and 53

here is a little-known trick:

find a key ** a b/c ** on your calculator

enter:

38

** a b/c **

53

=

you will get back 38⌜53 , which represents the fraction 38/53

now try it for 120/280

and it will reduce it to lowest terms 3⌜7 or 3/7

- math(help) -
**Ms. Sue**, Thursday, November 21, 2013 at 11:08am
138,435/3 = ?

38/53 is in its simplest form because the denominator is a prime number.

http://primes.utm.edu/lists/small/1000.txt

- clarification - math(help) -
**Reiny**, Thursday, November 21, 2013 at 11:13am
Just because one of the numbers is a prime, does not mean the fraction is in lowest terms.

e.g. 13/26 = 1/2

21/7 = 3

the numerator and denominator have to be "relatively prime", that is, no whole number exists that divides into both of them

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