10 and 21, 5 and 42, 14 and 15, 2 ans 105 ect.
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∙ 2012-05-01 22:10:31Example: 1/30 and 1/42The LCM (LCD) of 30 and 42 is 210.30 x 7 = 210, so multiply the fraction by 7/7.1/30 = 7/21042 x 5 = 210, so multiply the fraction by 5/51/45 = 5/210
Example: 1/30 and 1/42Their LCD is 210.Multiply each one by whatever it takes to make 210 in the denominator.30 x 7 = 21042 x 5 = 2101/30 x 7/7 = 7/2101/42 x 5/5 = 5/210
Since they have no common prime factors, multiply them together.3 x 7 x 10 = 210, the LCM
Example: 1/30 and 1/42Their LCD is 210.Multiply each one by whatever it takes to make 210 in the denominator.30 x 7 = 21042 x 5 = 2101/30 x 7/7 = 7/2101/42 x 5/5 = 5/210
210 and 420 have a GCF of 210.
21 multiply by 10 = 210
221
18690
They can be: 6*5*7 = 210
2x25
2 and 210
210
How about: 45 = 20 or 210 = 20
210
Multiply 210 by 0.20 (20 percent in decimal form) 210 x 0.2 = 42. 42 is 20 percent of 210 pounds.
Divide 147 by 210 and multiply the result by 100. The result is 70.
I suggest you divide 9825 / 210, round the result to the nearest integer, then multiply it back with 210 to get a multiple that is close to 9825.