A common multiple is a number that is a multiple of two or more numbers. The common multiples of 3 and 4 are 0, 12, 24, .... The least common multiple (LCM) of two numbers is the smallest number (not zero) that is amultiple of both.
8 16/1000 = 8 2/125
Keep whole number the same, divide the numerator and denominator by 8.
7.5. 10.5*5 and divide that by 7