Question

[mischievous boys]

-13/45	-	-2/45	=
-		+		-
2/45	+		=	1/5
=		=		=
	-		=

Answer 1

[Cold Wind]

-13/45	-	-2/45	=	-11/45
-		+		-
2/45	+	7/45	=	1/5
=		=		=
-1/3	-	1/9	=	-4/9