diff --git a/src/convert.js b/src/convert.js
index 8bb5e7a..c58b676 100644
--- a/src/convert.js
+++ b/src/convert.js
@@ -16,13 +16,15 @@ export function convert(data, schemaElement) {
     return data.map(v => v && decoder.decode(v))
   }
   if (ctype === 'DECIMAL') {
-    const scaleFactor = schemaElement.scale ? Math.pow(10, schemaElement.scale) : 1
+    const scale = schemaElement.scale || 0
+    const precision = schemaElement.precision || 0
+    const factor = Math.pow(10, scale - precision)
     if (typeof data[0] === 'number') {
-      return scaleFactor === 1 ? data : data.map(v => v * scaleFactor)
+      return factor === 1 ? data : data.map(v => v * factor)
     } else if (typeof data[0] === 'bigint') {
-      return scaleFactor === 1 ? data : data.map(v => v * BigInt(scaleFactor))
+      return factor === 1 ? data : data.map(v => v * BigInt(factor))
     } else {
-      return data.map(v => parseDecimal(v) * scaleFactor)
+      return data.map(v => parseDecimal(v) * factor)
     }
   }
   if (ctype === 'DATE') {
diff --git a/test/files/byte_array_decimal.json b/test/files/byte_array_decimal.json
index 7ce1ae6..7427451 100644
--- a/test/files/byte_array_decimal.json
+++ b/test/files/byte_array_decimal.json
@@ -1,26 +1,26 @@
 [
-  [ 10000 ],
-  [ 20000 ],
-  [ 30000 ],
-  [ 40000 ],
-  [ 50000 ],
-  [ 60000 ],
-  [ 70000 ],
-  [ 80000 ],
-  [ 90000 ],
-  [ 100000 ],
-  [ 110000 ],
-  [ 120000 ],
-  [ 130000 ],
-  [ 140000 ],
-  [ 150000 ],
-  [ 160000 ],
-  [ 170000 ],
-  [ 180000 ],
-  [ 190000 ],
-  [ 200000 ],
-  [ 210000 ],
-  [ 220000 ],
-  [ 230000 ],
-  [ 240000 ]
+  [ 1 ],
+  [ 2 ],
+  [ 3 ],
+  [ 4 ],
+  [ 5 ],
+  [ 6 ],
+  [ 7 ],
+  [ 8 ],
+  [ 9 ],
+  [ 10 ],
+  [ 11 ],
+  [ 12 ],
+  [ 13 ],
+  [ 14 ],
+  [ 15 ],
+  [ 16 ],
+  [ 17 ],
+  [ 18 ],
+  [ 19 ],
+  [ 20 ],
+  [ 21 ],
+  [ 22 ],
+  [ 23 ],
+  [ 24 ]
 ]