Edit in JSFiddle

var percent = 55;
var answer;

if (percent > 66.66 && percent <= 100) {
  answer = 'Answer 1';
} else if (percent > 33.33 && percent <= 66.66) {
  answer = 'Answer 2';
} else if (percent > 0 && percent <= 33.33) {
  answer = 'Answer 3';
}

console.log('Answer', answer)