Each proton is has a charge of +1, so you have +16 total for protons Each electron has a charge of -1, so you have -18 total for electrons 16 + -18 = -2 The net charge is -2.
Out of the 130 people surveyed, 99 people said they liked the movie. So to figure out the probability that the next person likes the movie, you divide 99 from 130. The answer is approximately 76%.