I need help with this question

Alcoa was $10.02 a share yesterday. today it is at $9.75 a share. if you own 50 shares, did ou have capital gain or loss ? how much of a gain or loss did you have ? express the capital gain/loss as a percent of the original price

Solve 13 + w/7= -18 (w/7 is a fraction)

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great