An ordinary resolution requires a simple majority (ie more than 50%) of shareholders to agree. Ordinary resolutions are generally used for routine changes.
At a general meeting, an ordinary resolution can be voted on by a show of hands. If more than 50% of the shareholders present at the meeting vote in favour of the resolution, it will pass. Shareholders can also request a poll vote at a general meeting. Here, shareholders have one vote per voting share they hold. For more information on poll votes, Ask a lawyer.
For written resolutions, each shareholder has one vote per voting share they hold. An ordinary resolution contained in a written resolution will only pass if shareholders holding more than 50% of the total voting rights of all shareholders vote in favour of the resolution. In other words, an ordinary resolution will only pass if more than 50% of all voting shares approve the resolution.
For more information on ordinary resolutions, read Company resolutions.