.bf-percent{
  font-size:52px;
  font-weight:900;
  color:#ff1f1f;
  animation: pulse50 1.8s infinite ease-in-out;
}

@keyframes pulse50 {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.25); }
  100% { transform: scale(1); }
}