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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 572 · 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 540 =
  2. 2.5% of 400 =
  3. 3.5% of 450 =
  4. 4.25% of 400 =
  5. 5.20% of 290 =
  6. 6.10% of 430 =
  7. 7.15% of 640 =
  8. 8.15% of 520 =
  9. 9.1% of 800 =
  10. 10.5% of 580 =
  11. 11.10% of 30 =
  12. 12.5% of 320 =
  13. 13.10% of 40 =
  14. 14.5% of 580 =
  15. 15.25% of 620 =
  16. 16.50% of 380 =
  17. 17.10% of 460 =
  18. 18.25% of 80 =
  19. 19.15% of 700 =
  20. 20.10% of 730 =
  21. 21.25% of 800 =
  22. 22.20% of 220 =
  23. 23.50% of 730 =
  24. 24.20% of 460 =
  25. 25.1% of 780 =
  26. 26.50% of 840 =
  27. 27.5% of 360 =
  28. 28.15% of 50 =
  29. 29.10% of 330 =
  30. 30.20% of 390 =
  31. 31.1% of 530 =
  32. 32.15% of 780 =
  33. 33.5% of 370 =
  34. 34.10% of 200 =
  35. 35.25% of 280 =
  36. 36.15% of 850 =
  37. 37.25% of 40 =
  38. 38.1% of 820 =
  39. 39.10% of 340 =
  40. 40.10% of 410 =

Answer key

  1. 27
  2. 20
  3. 22.5
  4. 100
  5. 58
  6. 43
  7. 96
  8. 78
  9. 8
  10. 29
  11. 3
  12. 16
  13. 4
  14. 29
  15. 155
  16. 190
  17. 46
  18. 20
  19. 105
  20. 73
  21. 200
  22. 44
  23. 365
  24. 92
  25. 7.8
  26. 420
  27. 18
  28. 7.5
  29. 33
  30. 78
  31. 5.3
  32. 117
  33. 18.5
  34. 20
  35. 70
  36. 127.5
  37. 10
  38. 8.2
  39. 34
  40. 41

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