Module 4-Fraction Operations 1. 80% expressed as a fraction is 2. In a fraction, the denominator tells the total number of equal parts into which the unit is divided. 3. 5/13 minus 2/13 equals 4. 7/12 plus 1/4 equals 5. When multiplying fractions you have to find a common denominator. 6. 3/8 expressed as a percentage is 7. 7/8 minus 5/6 is 8. John Smith and Susan Jones own a business together. It was agreed that Susan would work 45 hours per week and spend 15 hours working with customers and the remaining time supervising the employees. What fraction of Susan's time is spent working with customers? 9. 3/11 divided by 2/5 is 10. A+ Bakery uses vanilla extract in the baking of their cookies. A small bottle of vanilla extract has 16 ounces in it. If each batch of cookies baked requires 2/3 of an ounce of vanilla how many times can the bakery use the bottle before it is empty