A low calorie bread has 120 calories in a 3 slice serving. This is 15% fewer than the number of calories in a serving of regular bread. How many calories are in the same size serving of regular bread?

Let x represent calories in normal bread. Since the low calorie bread is said to have 15 percent fewer calories then it can be said that the calories in the low cal bread is 85 percent of the calories in regular bread. So x * (.85) = 120

x=120/0.85