diff --git a/src/transaction/transaction.controller.ts b/src/transaction/transaction.controller.ts
index f0728e8..740794d 100644
--- a/src/transaction/transaction.controller.ts
+++ b/src/transaction/transaction.controller.ts
@@ -137,7 +137,7 @@ export class TransactionController {
       client_id: transactionInput.client_id,
       base_currency: Currency.EUR,
       base_amount:
-        transactionAmount * exchangeRateResponse[transactionInput.currency],
+        transactionAmount / exchangeRateResponse[transactionInput.currency],
     };
 
     const commissionAmount = this.applyRules(