diff --git a/bits/10_ssf.js b/bits/10_ssf.js
index 7b76850..a63b8fe 100644
--- a/bits/10_ssf.js
+++ b/bits/10_ssf.js
@@ -417,7 +417,7 @@ function hashq(str/*:string*/)/*:string*/ {
 	}
 	return o;
 }
-function rnd(val/*:number*/, d/*:number*/)/*:string*/ { var dd = Math.pow(10,d); return ""+(Math.round(val * dd)/dd); }
+function rnd(val/*:number*/, d/*:number*/)/*:string*/ { return ""+(+(Math.round(val + "e+" + d)  + "e-" + d)); }
 function dec(val/*:number*/, d/*:number*/)/*:number*/ {
 	var _frac = val - Math.floor(val), dd = Math.pow(10,d);
 	if (d < ('' + Math.round(_frac * dd)).length) return 0;
diff --git a/xlsx.flow.js b/xlsx.flow.js
index 6d41115..725b401 100644
--- a/xlsx.flow.js
+++ b/xlsx.flow.js
@@ -703,7 +703,7 @@ function hashq(str/*:string*/)/*:string*/ {
 	}
 	return o;
 }
-function rnd(val/*:number*/, d/*:number*/)/*:string*/ { var dd = Math.pow(10,d); return ""+(Math.round(val * dd)/dd); }
+function rnd(val/*:number*/, d/*:number*/)/*:string*/ { return ""+(+(Math.round(val + "e+" + d)  + "e-" + d)); }
 function dec(val/*:number*/, d/*:number*/)/*:number*/ {
 	var _frac = val - Math.floor(val), dd = Math.pow(10,d);
 	if (d < ('' + Math.round(_frac * dd)).length) return 0;
diff --git a/xlsx.js b/xlsx.js
index ac0394d..526ccbf 100644
--- a/xlsx.js
+++ b/xlsx.js
@@ -682,7 +682,7 @@ function hashq(str) {
 	}
 	return o;
 }
-function rnd(val, d) { var dd = Math.pow(10,d); return ""+(Math.round(val * dd)/dd); }
+function rnd(val, d) { return ""+(+(Math.round(val + "e+" + d)  + "e-" + d)); }
 function dec(val, d) {
 	var _frac = val - Math.floor(val), dd = Math.pow(10,d);
 	if (d < ('' + Math.round(_frac * dd)).length) return 0;