diff --git a/codewars/7kyu/calculate-julie-s-age/koronya.js b/codewars/7kyu/calculate-julie-s-age/koronya.js
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index 000000000..cc3fa83fb
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+++ b/codewars/7kyu/calculate-julie-s-age/koronya.js
@@ -0,0 +1,11 @@
+// [JS][7kyu] Calculate Julie's Age
+// calculate-julie-s-age
+// https://www.codewars.com/kata/558445a88826e1376b000011/train/javascript
+
+const age = (x, y) => {
+  const brother = x / (y - 1)
+  return brother * y
+}
+
+age(6, 3) === 9
+age(-15, 0.25) === 5