<div class="multigraph">
  <span class="tooltip">70%</span>
  <span class="graph"></span>
</div>
*, *:after, *:before {
  box-sizing: border-box;
  font-family: roboto
}
body {
  background: #eee;
}
.multigraph {
  width: 300px;
  height: 150px;
  position: absolute;
  top: 50%;
  left: 50% ;
  margin: -150px;
  overflow: hidden;
}
.multigraph:before {
  content: '';
  width: 300px;
  height: 150px;
  position: absolute;
  border: 30px solid rgba(0,0,0,0.1);
  border-radius: 300px 300px 0 0;
  border-bottom: none;
}
.tooltip {
  width: 80px;
  height: 30px;
  background: lightgrey;
  text-align: center;
  font-size: 20px;
  line-height: 30px;
  font-weight: 200;
  color: #000;
  border: 1px solid #grey;
  position: absolute;
  left: 50%;
  bottom: -40px;
  margin: -40px;
  transition: all 300ms ease-in-out;
  box-shadow: 0 0 5px grey;
  opacity: 0;
  transform: scale(.1);
}






 .multigraph:hover .tooltip {
  bottom: 75%;
  opacity: .8;
  transform: scale(1);
}
.graph {
  width: 300px;
  height: 150px;
  position: absolute;

}
.graph:before, .graph:after {
  width: 300px;
  height: 150px;
  position: absolute;
  top: 100%;
  border: 30px solid #000;
  content: '';
  border-radius:0 0 300px 300px;
  border-top: none;
  animation: demo 3s;
  transform-origin: center top;
}
.graph:after {
  transform: rotate(150deg);
}

@keyframes demo {
  0% { transform: rotate(0deg) }
  50% { transform: rotate(180deg) }
}

External CSS

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External JavaScript

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