Though the contribution of assets among different parties could be used to determine percentage of shares owned, however, it may not be the case. Actually the ratio of shares owned by different parties represents the participation or sharing of profit/loss in the future. In other words, you may invest your assets as a creditor to the corp without owning any shares or the shares you own is not in the same ratio of the contribution of assets among different parties. There are different classes of shares that you and your partner may consider to issue as well as the percentage owned, which formed part of the Shareholder Agreement that you and your partner have to sit down and discuss with your lawyer. You may check with your lawyer that other clauses may have to be included in order to protect the right and observe the duties for each shareholder in the operation of the business.
I am a professional accountant. Feel free to let me know if there is anything I can help or work out with your lawyer. I can be reached at email@example.com, or my website at www.annawliu.com
Regards, Anna Liu