.wrapper {
    width: 600px;
    margin: 100px auto;
}
.content {
    width: 300px;
    height: 300px;
    font-size: 30px;
    line-height: 300px;
    text-align: center;
    background: orange;
    color: #fff;
}
.tool {
    position: relative;
    width: 300px;
    height: 30px;
    margin-top: 20px;
}
.progress {
    position: absolute;
    left: 0;
    width: 250px;
    height: 30px;
    border: 1px solid #ccc;
    border-radius: 15px;
    overflow: hidden;
}
.val {
    width: 0px;
    height: 30px;
    background: greenyellow;
}
.text {
    position: absolute;
    right: 0;
    line-height: 30px;
}