diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/live/roulette/v2/RouletteService.kt b/src/main/kotlin/kr/co/vividnext/sodalive/live/roulette/v2/RouletteService.kt
index b8c39e9..84ad0bc 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/live/roulette/v2/RouletteService.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/live/roulette/v2/RouletteService.kt
@@ -23,6 +23,7 @@ import kr.co.vividnext.sodalive.member.MemberRole
 import org.springframework.data.repository.findByIdOrNull
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
+import java.math.BigDecimal
 import java.util.concurrent.locks.ReentrantReadWriteLock
 import kotlin.concurrent.write
 import kotlin.random.Random
@@ -236,8 +237,8 @@ class RouletteService(
             throw SodaException("룰렛 옵션은 최소 2개, 최대 10개까지 설정할 수 있습니다.")
         }
 
-        val totalPercentage = items.map { it.percentage }.sum()
-        if (totalPercentage != 100f) {
+        val totalPercentage = items.map { BigDecimal(it.percentage.toDouble()) }.reduce(BigDecimal::plus)
+        if (totalPercentage != BigDecimal(100.0)) {
             throw SodaException("확률이 100%가 아닙니다")
         }
     }