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+//Problem 4.06:
+
+//initializing the variables:
+e1 = 0.65;
+e2 = 0.98;
+mdtin = 76; // in lb
+
+//calculation:
+mdtout1 = (1 - e1)*mdtin
+mdtout2 = (1 - e2)*mdtout1
+E = 1 - mdtout2/mdtin
+perE = E*100
+
+printf("\n\nResult\n\n")
+printf("\n overall fractional efficiency at percent basis is %.1f percent",perE) \ No newline at end of file