It means that one quarter, 0.25 or 25% of the total number of the set are in a subset
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It is: 4 to 1
No. 4/ 20 = 1/5, whichis not the same as 1/4
direct proportion indirect proportion additive proportion partitive proportion
No. 3 out of 4 is 3/4 (75%). But 6 out of 12 is 1/2 (50%).
It means that different compounds composed of the same elements have their own unique proportion of those elements. For example, both water (H2O) and hydrogen peroxide (H2O2) are composed of hydrogen and oxygen. However, the proportion of hydrogen to oxygen in water is 2 to 1, and the proportion of hydrogen to oxygen in hydrogen peroxide is 1 to 1.