Are 3 39 5 and 12–92–3 –6 multiplicative inverses?

To determine if two numbers are multiplicative inverses, you multiply them together. If the result is 1, then they are multiplicative inverses.

Step 1: Convert the fractions to decimal form.

3/39 = 0.07692307692307693 12/-92 = -0.13043478260869565

Step 2: Multiply the two numbers together.

0.07692307692307693 * -0.13043478260869565 = -0.010033444816053512

Since the result is not 1, the two numbers are not multiplicative inverses.