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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 155 · 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 230 =
  2. 2.5% of 220 =
  3. 3.5% of 230 =
  4. 4.15% of 780 =
  5. 5.1% of 220 =
  6. 6.10% of 190 =
  7. 7.50% of 60 =
  8. 8.10% of 210 =
  9. 9.5% of 670 =
  10. 10.10% of 240 =
  11. 11.20% of 640 =
  12. 12.50% of 80 =
  13. 13.25% of 800 =
  14. 14.20% of 660 =
  15. 15.50% of 450 =
  16. 16.50% of 550 =
  17. 17.15% of 840 =
  18. 18.1% of 390 =
  19. 19.5% of 130 =
  20. 20.20% of 700 =
  21. 21.50% of 840 =
  22. 22.50% of 690 =
  23. 23.10% of 420 =
  24. 24.1% of 670 =
  25. 25.15% of 330 =
  26. 26.10% of 130 =
  27. 27.20% of 810 =
  28. 28.1% of 40 =
  29. 29.15% of 120 =
  30. 30.1% of 140 =
  31. 31.15% of 170 =
  32. 32.5% of 810 =
  33. 33.50% of 450 =
  34. 34.15% of 620 =
  35. 35.5% of 550 =
  36. 36.15% of 540 =
  37. 37.10% of 640 =
  38. 38.1% of 170 =
  39. 39.1% of 730 =
  40. 40.10% of 240 =

Answer key

  1. 46
  2. 11
  3. 11.5
  4. 117
  5. 2.2
  6. 19
  7. 30
  8. 21
  9. 33.5
  10. 24
  11. 128
  12. 40
  13. 200
  14. 132
  15. 225
  16. 275
  17. 126
  18. 3.9
  19. 6.5
  20. 140
  21. 420
  22. 345
  23. 42
  24. 6.7
  25. 49.5
  26. 13
  27. 162
  28. 0.4
  29. 18
  30. 1.4
  31. 25.5
  32. 40.5
  33. 225
  34. 93
  35. 27.5
  36. 81
  37. 64
  38. 1.7
  39. 7.3
  40. 24

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