what is the common denominator for 15/17 and 11/12 and 8/9 and 2/5 and 4/7

what is the common denominator for 15/17, 11/12, 8/9, 2/5 and 4/7?
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1 Answer

kommon bottom is kalled "leest kommon multipel" in kommon guvt-skuel-teech

krat speek

LCM(5,7,9,12,17)=21,420

yu multipli all the bottoms tugether, then kut it down if yu kan ("redues" in good krat speek)

that meen divide produkt bi kommon fakters av all em numbers

hard tu du sins 5, 7, & 17 are primes (no fakters)
by

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