So we have 180 degree line here, so lets take 104 and add the 10 from the expression inside the parenthesis on the other angle. We add 43 to 114 and get 147. We can then add 147+33 and get 180 which is equivalent to the angle.
Total people=180 discount received people=25%+10%=35% People who did not receive discount=100-35%=65% 65%of 180=65×180/100=117 So 117 people did not receive discount