Question

Which numer produces a rational number when multplied by 0.25

Answer 1

For this case, the first thing you should know is the definition of a rational number.

A rational number is that you can write as an exact fraction.

For example,

0.25 = 1/4

We have then that:

2/9 + 1/4 = ((2 * 4) + (1 * 9)) / (9 * 4) = (8 + 9) / (36) = 15/36 = 5/12

5/12 is a rational number.

Explanation:

A number that produces a ration number when added to 0.25 is:

2/9 (option C)

Answer 2

D.)

Explanation:

After trying each answer, the correct answer choice is 0.45.

0.45 × 0.25 = 0.1125

0.1125 = rational number

Tip: When you multiply rational numbers, you always end up with a rational number.