NumberControl.js

const NumberControl = ({ number, onClick, completionPercentage }) => (
  <div
    key={number}
    className="number"
    onClick={onClick}
  >
    <div>{number}</div>
    <CirclularProgress percent={completionPercentage} />
    <style jsx>{NumberControlStyle}</style>
  </div>
);

NumberControl.propTypes = {
  number: PropTypes.number.isRequired,
  onClick: PropTypes.func,
  completionPercentage: PropTypes.number.isRequired,
};