Day 105

Any ideas on how to build a div using the dimensions of the background image using percentages?  Me either...
#CodingPhase #TheCodingWay #365CodingPhaseChallenge

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#main-bg-img #bg-img {
    background-image: url('/img/main-bg-650.jpg');
    width: 100vw;
    max-width: 650px;
    height: auto;
    max-height: 272px;
    border: 5px solid blue;
  }