vue处理小数保留两位并百分比展示

1，html

 <el-table-column prop="drugRate" label="药占比" width="auto">
                  <template slot-scope="scope">
                 {{ towNumber(scope.row.drugRate*100) }}%
                  </template>
              </el-table-column>

2，js

        towNumber(val) {      
　return Number(val).toFixed(2); 
},