325 X 2 = 650 which in Roman numerals is DCL
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The factors of 325 are 5 x 5 x 13 x 1. 112 is 2 x 2 x 2 x 2 x 7 x 1. The only common factor between the two is 1, so they are coprime (I think relatively prime is another term, meaning the same thing).
325 x 1 5 x 65 13 x 25
5 x 5 x 13 = 325
Written as a product of primes, 325 = 5^2 x 13 221 = 13 x 17 Therefore 13 goes into both 325 and 221
Subtracting 20 percent from 325 gives 325 x (1 - (20/100)) = 325 x 0.8 = 260.