a two-thirds majority vs a two-third majority

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AntiScam

Senior Member
Arabic
Hello,
In the sentence below, taken from Merriam Webster, why is the plural used instead of the singular form?

The law will pass only if it is approved by at least a two-thirds majority. [=if two out of three voters approve it]
Why not:
The law will pass only if it is approved by at least a two-third majority. [=if two out of three voters approve it]
 
  • Barque

    Senior Member
    Tamil
    I understand it as a noun used as an adjective.

    A two-thirds majority = A majority of two thirds of the voters.
     
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