What is 3/2 of 42?

How to calculate 3/2 of 42?

1. Multiply the whole number by the numerator of the fraction: 42 × 3 = 126
2. Divide this result by denominator of the fraction: 126/2 = 63
3. Simplify by dividing both the numerator and denominator by their GCD (2):
   • 126/2 = 63
   • 2/2 = 1
4. Which gives: 63/1

How does it work?

The principle behind finding a fraction of a number, such as 3/2 of 42, is rooted in the method of cross-multiplication.

Consider the following proportion: $\frac{3}{2}=\frac{x}{42}$ (where x represents 3/2 of 42)

1. Using the cross-multiplication method, multiply both numerators by their opposite denominators: $3\times 42=2x$
2. Which gives: $126=2x$
3. Divide both sides by 2 to isolate x: $\frac{126}{2}=\frac{2x}{2}$
4. Which gives the result: $\frac{126}{2}=x$ (or $\frac{63}{1}=x$)

Thus, 3/2 of 42 is equal to 63/1 (or 63 in its decimal form).