Answer:
7.5
Explanation:
One way in which you could do this problem would be to write and solve an equation of ratios:
100% 15
--------- = ----------
50% x
Cross multipying results in 100x = 750, so that x = 7.5.
50% of the number is 7.5.
The answer is 7.5.
Since we're looking for half of 15, divide 15 by 2 (or multiply 15 by 0.5, it's the same thing) and you get 7.5.
I hope this helped! :)
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