What is 3/1 of 39?

How to calculate 3/1 of 39?

1. Multiply the whole number by the numerator of the fraction: 39 × 3 = 117
2. Divide this result by denominator of the fraction: 117/1 = 117

How does it work?

The principle behind finding a fraction of a number, such as 3/1 of 39, is rooted in the method of cross-multiplication.

Consider the following proportion: $\frac{3}{1}=\frac{x}{39}$ (where x represents 3/1 of 39)

1. Using the cross-multiplication method, multiply both numerators by their opposite denominators: $3\times 39=1x$
2. Which gives: $117=1x$
3. Divide both sides by 1 to isolate x: $\frac{117}{1}=\frac{1x}{1}$
4. Which gives the result: $\frac{117}{1}=x$

Thus, 3/1 of 39 is equal to 117/1 (or 117 in its decimal form).