How do I figure out:

35% of what number is 17.5?

Question

How do I figure out:

35% of what number is 17.5?

anonymous · Answer

can anyone help me with proportions?
please?

anonymous · Answer

35/100 = 17.5/x

anonymous · Answer

take your 17.5 and multiply it by .35

darthsid · Answer

Here's how to approach these types of problems:

Let the number in question be x. Now, you are given that 35% of x is 17.5
This can be written as :

darthsid · Answer

Sorry, accidentally posted above.


35/100 x = 17.5

Multiply both sides by hundred,
35x = 1750

Now, you can divide both sides by 35 to get the answer.

anonymous · Answer

Thank you!

What about:  What number is 23% of 16?  How?

anonymous · Answer

23 percent is 23 of 100. Your proportion should look like:
23         16
---  =  ---
100        x

Solve by cross multiplying:

23x=16*100

anonymous · Answer

But then what?
is the answer 23x =1600?
Don't i need to get x by itself?
To solve?