function histogram(props) {
  let inputNum = Number(props[0]);
  let number;
  let p1 = 0;
  let p2 = 0;
  let p3 = 0;
  let p4 = 0;
  let p5 = 0;
  let counter1 = 0;
  let counter2 = 0;
  let counter3 = 0;
  let counter4 = 0;
  let counter5 = 0;
  for (let index = 1; index <= inputNum; index++) {
    number = Number(props[index]);
    if (number < 200) {
      counter1 += 1;
      p1 = (counter1 / inputNum) * 100;
    } else if (number >= 200 && number <= 399) {
      counter2 += 1;
      p2 = (counter2 / inputNum) * 100;
    } else if (number >= 400 && number <= 599) {
      counter3 += 1;
      p3 = (counter3 / inputNum) * 100;
    } else if (number >= 600 && number <= 799) {
      counter4 += 1;
      p4 = (counter4 / inputNum) * 100;
    } else {
      counter5 += 1;
      p5 = (counter5 / inputNum) * 100;
    }
  }
  console.log(`${p1.toFixed(2)}%\n${p2.toFixed(2)}%\n${p3.toFixed(2)}%\n${p4.toFixed(2)}%\n${p5.toFixed(2)}%`);
}