Final answer:
To convict a defendant in the United States, 100% of the jurors must agree on the verdict, which means the jury's decision must be unanimous.
Step-by-step explanation:
In the United States, theminimum percentage of jurors that must agree to convict a defendant of a criminal charge is 100%. This means that for a defendant to be found guilty in a jury trial, the jury must reach a unanimous verdict. The unanimity rule applies in most US courtrooms, as well as in some other countries like Australia and Ireland.
The jury, typically consisting of twelve members, is responsible for deliberating in secret and must all agree on the verdict. In the event that the jurors cannot reach a unanimous decision, the result can be a mistrial, leading to the prosecution potentially trying the case all over again.