No. 3 out of 4 is 3/4 (75%).
But 6 out of 12 is 1/2 (50%).
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Yes
It is: 3 4 and 9 12 because 9/12 = 3/4
lcm(3, 4) = 12 lcm(3, 6) = 6 lcm(4, 6) = 12 lcm(3, 4, 6) = 12.
If there is a proportion a/b = c/d, then ad = bc. Examples: 3/4 =? 5/6 3 x 6 =? 4 x 5 18 = 20 False (this is not a proportion) 16/6 =? 8/3 16 x 3 =? 6 x 8 48 = 48 True (this is a proportion)
A proportion is an equation containing to ratios (usually written as fractions) which are equal to each other. This would require four numbers, not six. Of the numbers listed, you can make a proportion out of 4:8 = 3:6.