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diff --git a/2459/CH16/EX16.5/Ex16_5.sce b/2459/CH16/EX16.5/Ex16_5.sce
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+//chapter16
+//example16.5
+//page347
+
+Av=50
+Avf=25
+
+// since Avf=Av/(1+Av*mv), we get
+mv=(Av/Avf-1)/Av
+
+// without feedback, gain falls from 50 to 40
+Av1=50
+Av2=40
+reduction1=100*(Av1-Av2)/Av1
+
+// with feedback
+Av3=25
+Av4=Av2/(1+mv*Av2)
+reduction2=100*(Av3-Av4)/Av3
+
+printf("percentage reduction in gain : \n with feedback = %.3f percent \n ",reduction1)
+printf("without feedback = %.3f perent",reduction2)