Z Company's net income is $10,000 one year and $15,000 the following year. Y Company's net income is $100,000 one year and $120,000 the following year.

What is the percentage increase from one year to the next for each company?

1. Z Company 50%; Y Company 20%

2. Z Company 50%; Y Company 17%

3. Z Company 33%; Y Company 20%

4. Z Company 67%; Y Company 83%