#### Answer

$1 \div 4 = \frac{1}{4}$
1 and 4 are natural numbers, but $\frac{1}{4}$ is not.

#### Work Step by Step

RECALL:
Natural numbers are the counting numbers 1, 2, 3, ...
Natural numbers are not closed with respect to division, as can be seen in the example below:
1 and 4 are natural numbers.
However, $1 \div 4 = \frac{1}{4}$, which is not a natural number.