Joan A. answered 03/12/15
Tutor
New to Wyzant
Retired professional specializing in Math, Science, and English
a) Mike owns 3/4 or 75% of the pre-split number after the split. The post split price is 4/3 of $4.20 or 4/3 x $4.20 = $5.60
A way to check this answer is that the value of the shares should be the same pre-split vs. post split.
Assume he had 100 shares @ $4.20/share = $420
Applying the split, the 75 shares @ $5.60 = $420
b) The post split number of outstanding shares is 75% of the pre-split number. The market cap is the same pre- and post- split.