我完成遍历之后，显示的不是数值，应该如何写if判断

Question

   $.each(data, function (i,gui){
                    console.log(JSON.stringify(gui))
                    $("#guishutable").append("<tr>" +
                        "<td style='width: 200px;border: 1px solid black;'>"+gui.name+"</td>" +
                        "<td  style='width: 200px;border: 1px solid black;'>"+gui.currentCount+"</td>" +
                        "<td id='abc' style='width: 200px;border: 1px solid black;'>"+(gui.currentCount/jis)+"</td>" +
                        "<td  style='width: 200px;border: 1px solid black;'>"+gui.lastCount+"</td>" +
                        "<td  style='width: 200px;border: 1px solid black;'>"+(gui.lastCount/LastPeriod)+"</td>" +
                        "<td style='width: 200px;border: 1px solid black;'>"+(((gui.currentCount/jis)-(gui.lastCount/LastPeriod))/(gui.lastCount/LastPeriod))+"</td></tr>");


                });
            }
        });

```我这样写提示错误

![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/267233436736178.png "#left")