15 is what percentage of 30

15 is 50 percentage of 30.

Step-by-step explanation:

50%

Step-by-step explanation:

half of 30 is 15, and half of 100% (which would be 30) is 50% (which would end up being 15). Math does not need to be involved in this problem.

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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