diff --git a/src/pools/fixedRate/FixedRateExchange.ts b/src/pools/fixedRate/FixedRateExchange.ts
index dff8f5852..5617f9ea6 100644
--- a/src/pools/fixedRate/FixedRateExchange.ts
+++ b/src/pools/fixedRate/FixedRateExchange.ts
@@ -539,41 +539,29 @@ export class FixedRateExchange {
     exchangeId: string,
     datatokenAmount: string
   ): Promise<PriceAndFees> {
+    const fixedRateExchange = await this.getExchange(exchangeId)
     const result = await this.contract.methods
       .calcBaseInGivenOutDT(
         exchangeId,
-        await this.amountToUnits(
-          (
-            await this.getExchange(exchangeId)
-          ).datatoken,
-          datatokenAmount
-        )
+        await this.amountToUnits(fixedRateExchange.datatoken, datatokenAmount)
       )
       .call()
 
     const priceAndFees = {
       baseTokenAmount: await this.unitsToAmount(
-        (
-          await this.getExchange(exchangeId)
-        ).baseToken,
+        fixedRateExchange.baseToken,
         result.baseTokenAmount
       ),
       baseTokenAmountBeforeFee: await this.unitsToAmount(
-        (
-          await this.getExchange(exchangeId)
-        ).baseToken,
+        fixedRateExchange.baseToken,
         result.baseTokenAmountBeforeFee
       ),
       marketFeeAmount: await this.unitsToAmount(
-        (
-          await this.getExchange(exchangeId)
-        ).baseToken,
+        fixedRateExchange.baseToken,
         result.marketFeeAmount
       ),
       oceanFeeAmount: await this.unitsToAmount(
-        (
-          await this.getExchange(exchangeId)
-        ).baseToken,
+        fixedRateExchange.baseToken,
         result.oceanFeeAmount
       )
     } as PriceAndFees
diff --git a/src/utils/ContractUtils.ts b/src/utils/ContractUtils.ts
index 3c37eeced..20cb3dc8d 100644
--- a/src/utils/ContractUtils.ts
+++ b/src/utils/ContractUtils.ts
@@ -121,7 +121,11 @@ export async function unitsToAmount(
     if (decimals === '0') {
       decimals = 18
     }
-    const amountFormatted = new BigNumber(parseInt(amount) / 10 ** decimals)
+
+    const amountFormatted = new BigNumber(amount).div(
+      new BigNumber(10).exponentiatedBy(decimals)
+    )
+
     BigNumber.config({ EXPONENTIAL_AT: 50 })
     return amountFormatted.toString()
   } catch (e) {
@@ -140,8 +144,12 @@ export async function amountToUnits(
     if (decimals === '0') {
       decimals = 18
     }
-    const amountFormatted = new BigNumber(parseInt(amount) * 10 ** decimals)
     BigNumber.config({ EXPONENTIAL_AT: 50 })
+
+    const amountFormatted = new BigNumber(amount).times(
+      new BigNumber(10).exponentiatedBy(decimals)
+    )
+
     return amountFormatted.toString()
   } catch (e) {
     LoggerInstance.error(`ERROR: FAILED TO CALL DECIMALS(), USING 18', ${e.message}`)