People would agree that the Labour government in Britain received the majority of votes in the recent UK elections.
But they had only received 33.7% of casted votes. Which is 20% among eligible voters.
Majority = a greater number
Majority: (n.):[0]
1: a number or percentage equaling more than half of a total a majority of voters a two-thirds majority
Feel free to quibble about whose definition is correct. I'm sure the King will richly reward you for defending his English.
[0] https://www.merriam-webster.com/dictionary/majority
Edit: Fixed formatting.
People would agree that the Labour government in Britain received the majority of votes in the recent UK elections.
But they had only received 33.7% of casted votes. Which is 20% among eligible voters.
Majority = a greater number