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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 249 · 40 questions
TalentJR

The fast method (Build from 10%): 10%: divide by 10. 1%: divide by 100. 5% = half of 10%, 20% = double 10%, 15% = 10% + 5%. 50% = half, 25% = half of a half.

NameDateTime takenScore ___ / 40
  1. 1.20% of 320 =
  2. 2.1% of 450 =
  3. 3.1% of 40 =
  4. 4.10% of 20 =
  5. 5.1% of 680 =
  6. 6.10% of 770 =
  7. 7.50% of 20 =
  8. 8.25% of 230 =
  9. 9.15% of 250 =
  10. 10.1% of 100 =
  11. 11.50% of 480 =
  12. 12.20% of 680 =
  13. 13.25% of 890 =
  14. 14.1% of 220 =
  15. 15.25% of 460 =
  16. 16.10% of 700 =
  17. 17.20% of 70 =
  18. 18.50% of 440 =
  19. 19.5% of 250 =
  20. 20.15% of 30 =
  21. 21.25% of 20 =
  22. 22.50% of 30 =
  23. 23.5% of 690 =
  24. 24.1% of 560 =
  25. 25.1% of 450 =
  26. 26.5% of 860 =
  27. 27.10% of 810 =
  28. 28.5% of 790 =
  29. 29.10% of 240 =
  30. 30.20% of 790 =
  31. 31.5% of 90 =
  32. 32.1% of 70 =
  33. 33.1% of 280 =
  34. 34.25% of 600 =
  35. 35.50% of 690 =
  36. 36.1% of 190 =
  37. 37.5% of 60 =
  38. 38.15% of 270 =
  39. 39.15% of 140 =
  40. 40.50% of 450 =

Answer key

  1. 64
  2. 4.5
  3. 0.4
  4. 2
  5. 6.8
  6. 77
  7. 10
  8. 57.5
  9. 37.5
  10. 1
  11. 240
  12. 136
  13. 222.5
  14. 2.2
  15. 115
  16. 70
  17. 14
  18. 220
  19. 12.5
  20. 4.5
  21. 5
  22. 15
  23. 34.5
  24. 5.6
  25. 4.5
  26. 43
  27. 81
  28. 39.5
  29. 24
  30. 158
  31. 4.5
  32. 0.7
  33. 2.8
  34. 150
  35. 345
  36. 1.9
  37. 3
  38. 40.5
  39. 21
  40. 225

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