What is 3/9 of 20?

How to calculate 3/9 of 20?

1. Multiply the whole number by the numerator of the fraction: 20 × 3 = 60
2. Divide this result by denominator of the fraction: 60/9 = 6.6666666666667
3. Simplify by dividing both the numerator and denominator by their GCD (3):
   • 60/3 = 20
   • 9/3 = 3
4. Which gives: 20/3

Since 20/3 is an improper fraction, the result could also be expressed as a mixed number: 6 2/3

How does it work?

The principle behind finding a fraction of a number, such as 3/9 of 20, is rooted in the method of cross-multiplication.

Consider the following proportion: $\frac{3}{9}=\frac{x}{20}$ (where x represents 3/9 of 20)

1. Using the cross-multiplication method, multiply both numerators by their opposite denominators: $3\times 20=9x$
2. Which gives: $60=9x$
3. Divide both sides by 9 to isolate x: $\frac{60}{9}=\frac{9x}{9}$
4. Which gives the result: $\frac{60}{9}=x$ (or $\frac{20}{3}=x$)

Thus, 3/9 of 20 is equal to 20/3 (or 6.6666666666667 in its decimal form).