Which of the following correctly states the fraction and

Question

In each statement below, like-terms have been correctly and incorrectly combined. Select the statement that has correctly combined like-terms.

1. 8x-6=2x
2. 2x+6x=8x^2
3. 8x^2-5x^2=3x
4. 6x^2-x^2=5x^2

A local city council member recently polled residents in her district about their perceptions of crime and safety in the area. She asked 240 residents to rate their area as safe, unsafe, or undecided. 168 residents said their area was safe, 24 residents said their area was unsafe, and 48 residents were undecided about their area's safety.  

Which of the following correctly states the fraction and corresponding percentage of residents who are undecided about their area's safety?

1. 24/240 or 10%
2. 48/240 or 20%
3. 168/240 or 70%
4. 72/240 or 30%