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+clc
+clear
+//Input data
+r1=6;//Initial compression ratio
+r2=7;//Final compression ratio
+r=1.4;//Isentropic coefficient of air
+
+//Calculations
+nr1=(1-(1/r1)^(r-1))*100;//Otto cycle efficiency when compression ratio is 6 in percentage
+nr2=(1-(1/r2)^(r-1))*100;//Otto cycle efficiency when compression ratio is 7 in percentage
+n=nr2-nr1;//Increase in efficiency in percentage
+
+//Output
+printf('The increase in efficiency due to change in compression ratio from 6 to 7 is %3.1fpercent',n)