One day during math class, the professor was demonstrating how to simplify a fraction. "Take the fraction 16/64. Now, cancelling the six in both the denominator and numerator, we get that 16/64 = 1/4."

"Wait a second!" piped up one student. "You can't just cancel the six!"

At this the professor turned around and stared at him incredulously, saying, "Oh, so you're telling us 16/64 is not equal to 1/4, are you?"

Joke Nodes: Geek Jokes: Simplifying Fractions