SOLUTION: Haveing trouble with this what is 35% of a number if 12 is 15 % of a number How do i do this type of equation, and what is it called?

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Question 909: Haveing trouble with this
what is 35% of a number if 12 is 15 % of a number
How do i do this type of equation, and what is it called?
Answer by matwiz(2) About Me  (Show Source):
You can put this solution on YOUR website!
Let x be that number
In mathematical language, the question is
0.35 x = ? if
12 = 0.15x
Let us solve this first: 12 = 0.15x ==> x = 80
So 0.35 x = (0.35)(80) = 28
Answer: The number is 28