Question

3 is 4% of what number ?

Answer 1

4%of x=3
which means that 0.04*x=3
                                  x=3/0.04
                                  x=75
Therefore,3 is 4% of 75

Answer 2

Set up a proportion.  X is the number you're looking for:

$\frac{3}{x}=\frac{4}{100}$

This relates 3 to x as 4 percent relates to 100.  Simplify the 4 and the 100 to 1 and 25, cross multiply, and solve for x:

$\frac{3}{x}=\frac{4}{100}\\\frac{3}{x}=\frac{1}{25}\\(x)(1)=(3)(25)\\x=75$

3 is 4% of 75.