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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 52 · 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. 1.5% of 240 =
  2. 2.1% of 120 =
  3. 3.50% of 90 =
  4. 4.50% of 650 =
  5. 5.25% of 660 =
  6. 6.5% of 830 =
  7. 7.15% of 700 =
  8. 8.50% of 660 =
  9. 9.25% of 590 =
  10. 10.5% of 650 =
  11. 11.15% of 870 =
  12. 12.50% of 310 =
  13. 13.10% of 240 =
  14. 14.5% of 440 =
  15. 15.50% of 150 =
  16. 16.25% of 460 =
  17. 17.25% of 800 =
  18. 18.5% of 370 =
  19. 19.15% of 60 =
  20. 20.5% of 830 =
  21. 21.15% of 800 =
  22. 22.50% of 540 =
  23. 23.20% of 710 =
  24. 24.20% of 900 =
  25. 25.50% of 560 =
  26. 26.1% of 20 =
  27. 27.10% of 850 =
  28. 28.25% of 40 =
  29. 29.1% of 880 =
  30. 30.15% of 720 =
  31. 31.20% of 830 =
  32. 32.15% of 340 =
  33. 33.25% of 640 =
  34. 34.5% of 120 =
  35. 35.25% of 860 =
  36. 36.10% of 490 =
  37. 37.10% of 350 =
  38. 38.10% of 310 =
  39. 39.25% of 230 =
  40. 40.1% of 770 =

Answer key

  1. 12
  2. 1.2
  3. 45
  4. 325
  5. 165
  6. 41.5
  7. 105
  8. 330
  9. 147.5
  10. 32.5
  11. 130.5
  12. 155
  13. 24
  14. 22
  15. 75
  16. 115
  17. 200
  18. 18.5
  19. 9
  20. 41.5
  21. 120
  22. 270
  23. 142
  24. 180
  25. 280
  26. 0.2
  27. 85
  28. 10
  29. 8.8
  30. 108
  31. 166
  32. 51
  33. 160
  34. 6
  35. 215
  36. 49
  37. 35
  38. 31
  39. 57.5
  40. 7.7

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