Set up a proportion and use cross multiplication to solve.

15 is
% of 60.

1 answer

To set up a proportion for the statement "15 is x% of 60," we can write it as:

\[ \frac{15}{60} = \frac{x}{100} \]

Next, we'll use cross multiplication to solve for \(x\):

Cross multiplying gives us:

\[ 15 \cdot 100 = 60 \cdot x \]

Calculating the left side:

\[ 1500 = 60x \]

Now, divide both sides by 60 to solve for \(x\):

\[ x = \frac{1500}{60} \]

Calculating that gives:

\[ x = 25 \]

Therefore, 15 is 25% of 60.