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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 169 · 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 620 =
  2. 2.50% of 70 =
  3. 3.5% of 660 =
  4. 4.25% of 70 =
  5. 5.5% of 420 =
  6. 6.15% of 20 =
  7. 7.50% of 150 =
  8. 8.10% of 760 =
  9. 9.5% of 550 =
  10. 10.20% of 810 =
  11. 11.20% of 140 =
  12. 12.15% of 410 =
  13. 13.25% of 220 =
  14. 14.5% of 270 =
  15. 15.50% of 880 =
  16. 16.1% of 550 =
  17. 17.5% of 390 =
  18. 18.20% of 590 =
  19. 19.10% of 370 =
  20. 20.25% of 810 =
  21. 21.15% of 480 =
  22. 22.50% of 230 =
  23. 23.25% of 640 =
  24. 24.5% of 600 =
  25. 25.5% of 870 =
  26. 26.10% of 430 =
  27. 27.5% of 630 =
  28. 28.15% of 330 =
  29. 29.50% of 280 =
  30. 30.10% of 40 =
  31. 31.50% of 400 =
  32. 32.1% of 90 =
  33. 33.5% of 590 =
  34. 34.15% of 240 =
  35. 35.10% of 230 =
  36. 36.5% of 60 =
  37. 37.25% of 350 =
  38. 38.5% of 30 =
  39. 39.20% of 140 =
  40. 40.1% of 720 =

Answer key

  1. 31
  2. 35
  3. 33
  4. 17.5
  5. 21
  6. 3
  7. 75
  8. 76
  9. 27.5
  10. 162
  11. 28
  12. 61.5
  13. 55
  14. 13.5
  15. 440
  16. 5.5
  17. 19.5
  18. 118
  19. 37
  20. 202.5
  21. 72
  22. 115
  23. 160
  24. 30
  25. 43.5
  26. 43
  27. 31.5
  28. 49.5
  29. 140
  30. 4
  31. 200
  32. 0.9
  33. 29.5
  34. 36
  35. 23
  36. 3
  37. 87.5
  38. 1.5
  39. 28
  40. 7.2

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