diff --git a/asm/math_util.s b/asm/math_util.s
deleted file mode 100644
index 43a99dad0f..0000000000
--- a/asm/math_util.s
+++ /dev/null
@@ -1,56 +0,0 @@
-	.include "asm/macros.inc"
-	.include "constants/constants.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start sub_8151624
-sub_8151624: @ 8151624
-	push {lr}
-	adds r1, r0, 0
-	movs r0, 0x80
-	lsls r0, 9
-	lsls r1, 16
-	asrs r1, 16
-	bl __divsi3
-	lsls r0, 16
-	asrs r0, 16
-	pop {r1}
-	bx r1
-	thumb_func_end sub_8151624
-
-	thumb_func_start sub_815163C
-sub_815163C: @ 815163C
-	push {lr}
-	lsls r0, 24
-	lsrs r0, 24
-	movs r2, 0x80
-	lsls r2, 1
-	lsls r2, r0
-	lsls r1, 16
-	asrs r1, 16
-	adds r0, r2, 0
-	bl __divsi3
-	lsls r0, 16
-	asrs r0, 16
-	pop {r1}
-	bx r1
-	thumb_func_end sub_815163C
-
-	thumb_func_start sub_815165C
-sub_815165C: @ 815165C
-	push {lr}
-	adds r2, r0, 0
-	ldr r1, _08151674
-	ldr r0, _08151670
-	asrs r3, r2, 31
-	bl __divdi3
-	pop {r1}
-	bx r1
-	.align 2, 0
-_08151670: .4byte 0x00010000
-_08151674: .4byte 0x00000000
-	thumb_func_end sub_815165C
-
-	.align 2, 0 @ Don't pad with nop.
diff --git a/ld_script.txt b/ld_script.txt
index bf0186b9db..2a33431b9a 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -192,7 +192,6 @@ SECTIONS {
         src/battle_message.o(.text);
         asm/cable_car.o(.text);
         src/math_util.o(.text);
-        asm/math_util.o(.text);
         asm/roulette_util.o(.text);
         asm/cable_car_util.o(.text);
         src/save.o(.text);
diff --git a/src/math_util.c b/src/math_util.c
index 3eb995d27b..83935454a4 100644
--- a/src/math_util.c
+++ b/src/math_util.c
@@ -60,3 +60,27 @@ s32 sub_81515FC(s32 x, s32 y)
     _x *= 256;
     return _x / y;
 }
+
+s16 sub_8151624(s16 y)
+{
+    s32 x;
+
+    x = 0x10000;
+    return x / y;
+}
+
+s16 sub_815163C(u8 s, s16 y)
+{
+    s32 x;
+
+    x = 0x100 << s;
+    return x / y;
+}
+
+s32 sub_815165C(s32 y)
+{
+    s64 x;
+
+    x = 0x10000;
+    return x / y;
+}