5星评价，1位小数显示

html代码片段：

　　　　　　<div class="star_box">
                <ul class="star_list fl">
                    <li class="item">
                        <div class="wrapper_star">
                            <img src="../../img/reserve/icon_star_32.png"/>
                        </div>
                    </li>
                    <li class="item">
                        <div class="wrapper_star">
                            <img src="../../img/reserve/icon_star_32.png"/>
                        </div>
                    </li>
                    <li class="item">
                        <div class="wrapper_star">
                            <img src="../../img/reserve/icon_star_32.png"/>
                        </div>
                    </li>
                    <li class="item">
                        <div class="wrapper_star">
                            <img src="../../img/reserve/icon_star_32.png"/>
                        </div>
                    </li>
                    <li class="item">
                        <div class="wrapper_star">
                            <img src="../../img/reserve/icon_star_32.png"/>
                        </div>
                    </li>
                </ul>
                <div class="star fl">5星</div>
            </div>

js方法：

// 根据传的几星评价渲染星星
            var starRender = function (num) {
                for (var i = 0; i < Math.ceil(num); i++) {
                    $('.star_list .item .wrapper_star').eq(i).show();
                }
                var temp = num*100 % 100;
                temp = temp + '%';
                $('.star_list .item .wrapper_star').eq( Math.floor(num) ).css('width',temp)
            }
            starRender(3.8);

css样式：

.container_motormaninfo .estimate .star_box{
    overflow: hidden;
    position: relative;
}
.container_motormaninfo .estimate .star_box .star_list {
  margin-top: 0.14rem;
  overflow: hidden;
}
.container_motormaninfo .estimate .star_box .star_list .item {
  width: 19px;
  height: 19px;
  float: left;
  margin-right: 6px;
  background: url(../../img/reserve/icon_star2_32.png) no-repeat center center;
  background-size: contain;
  position: relative;
}
.container_motormaninfo .estimate .star_box .star_list .item .wrapper_star {
    overflow: hidden;
    width:100%;
    display: none;
}
.container_motormaninfo .estimate .star_box .star_list .item img {
    max-width:19px;
}
.container_motormaninfo .estimate .star_box .star {
  font-size: 0.28rem;
  color: #787878;
  float: left;
  font-size: 0.28rem;
    margin-top:0.14rem;
}