diff --git a/pkg/api/rates_handlers.go b/pkg/api/rates_handlers.go
index 0395c459..9525da04 100644
--- a/pkg/api/rates_handlers.go
+++ b/pkg/api/rates_handlers.go
@@ -225,7 +225,7 @@ func (h *Handler) convertRates(
 		diff := 0.0
 		cp, _ := calculateConvertedPrice(entry.hist, currency, token)
 		if cp != 0 && convertedTodayPrice != 0 {
-			diff = math.Round(((convertedTodayPrice-cp)/convertedTodayPrice)*10000) / 100
+			diff = math.Round(((convertedTodayPrice-cp)/cp)*10000) / 100
 		}
 		switch {
 		case diff < 0: