The ratios below that are equivalent to 2:1 is 8:4, 10:5 and 6:3. That is options B, C, and E.
To find the ratio of a given two quantities how many times one quantity is greater or smaller than the other.
Therefore in option B, when 8:4 is simplified by division,
8/4 = 2/1 = 2:1
Therefore, in option C, when 10:5 is simplified by division,
10/5 = 2/1 = 2:1
Therefore, in option E, when 6:3 is simplified by division, 6/3 = 2/1 = 2:1
Therefore, the ratios below that are equivalent to 2:1 is 8:4, 10:5 and 6:3.
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