diff --git a/gasstation/gasstattion.go b/gasstation/gasstattion.go
index 8e9bcf06b7..4dfd0f8a92 100644
--- a/gasstation/gasstattion.go
+++ b/gasstation/gasstattion.go
@@ -236,8 +236,15 @@ func (gs *GasStation) FeeHistory(ctx context.Context, blocks, lastBlock uint64,
 
 func feesPercentiles(ascFees []*big.Int, percentiles []float64) []*big.Int {
 	res := make([]*big.Int, len(percentiles))
+	if len(ascFees) == 0 {
+		for i := range res {
+			res[i] = big.NewInt(0)
+		}
+		return res
+	}
 	for i, p := range percentiles {
-		idx := int(float64(len(ascFees)) * p)
+		// percentiles are given in [0, 100]
+		idx := int(float64(len(ascFees)) * p / 100)
 		if idx >= len(ascFees) {
 			idx = len(ascFees) - 1
 		}
diff --git a/gasstation/gasstattion_test.go b/gasstation/gasstattion_test.go
index 9824da10b4..9626a1efe3 100644
--- a/gasstation/gasstattion_test.go
+++ b/gasstation/gasstattion_test.go
@@ -283,3 +283,16 @@ func prepareBlocks(r *require.Assertions, cases []testActionGas) map[uint64]*blo
 	}
 	return blocks
 }
+
+func TestFeesPercentiles(t *testing.T) {
+	r := require.New(t)
+	fees := make([]*big.Int, 10)
+	for i := range fees {
+		fees[i] = big.NewInt(int64(i + 1))
+	}
+	got := feesPercentiles(fees, []float64{0, 25, 50, 75, 100})
+	r.Equal([]*big.Int{big.NewInt(1), big.NewInt(3), big.NewInt(6), big.NewInt(8), big.NewInt(10)}, got)
+
+	got = feesPercentiles(nil, []float64{10, 90})
+	r.Equal([]*big.Int{big.NewInt(0), big.NewInt(0)}, got)
+}