wikiHow Practice Problems and Answers to Subtract Fractions 1. 3/4 - 1/2 = 2. 5/6 - 1/3 = 3. 2/3 - 1/4 = 4. 4/5 - 2/5 = 5. 7/8 - 3/8 = 6. 5/6 - 2/3 = 7. 1/2 - 1/4 = 8. 2/3 - 1/6 = 9. 4/5 - 1/5 = 10. 6/7 - 4/7 = 11. If you have 3/4 of a pizza and you eat 1/2 of it, how much of the pizza do you have left? 12. If you have 5/6 of a bag of candy and you eat 1/3 of it, how much candy do you have left? 13. If you have 2/3 of a liter of juice and you pour out 1/4 of it, how much juice do you have left? 14. If you have 4/5 of a tank of gas and you drive 2/5 of it, how much gas do you have left? 15. If you have 7/8 of a yard of fabric and you use 3/8 of it, how much fabric do you have left? 16. If you have 5/6 of a package of cookies and you eat 2/3 of them, how many cookies do you have left? 17. If you have 1/2 of a pie and you eat 1/4 of it, how much of the pie do you have left? 18. If you have 2/3 of a cake and you cut 1/6 of it, how much of the cake do you have left? 19. If you have 4/5 of a book and you read 1/5 of it, how much of the book do you have left? 20. If you have 6/7 of a deck of cards and you play 4/7 of them, how many cards do you have left? Answer Key: 1. 1/4 2. 1/2 3. 1/4 4. 2/5 5. 2/8 6. 1/6 7. 1/4 8. 2/3 9. 3/5 10. 2/7 11. You have 1/4 of the pizza left. 12. You have 1/2 of the candy left. 13. You have 1/2 of the juice left. 14. You have 2/5 of the gas left. 15. You have 4/8 of the fabric left. 16. You have 1/6 of the cookies left. 17. You have 1/4 of the pie left. 18. You have 2/3 of the cake left. 19. You have 4/5 of the book left. 20. You have 2/7 of the deck of cards left. Page