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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 688 · 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. 1.10% of 830 =
  2. 2.10% of 710 =
  3. 3.25% of 200 =
  4. 4.5% of 160 =
  5. 5.15% of 460 =
  6. 6.10% of 290 =
  7. 7.1% of 400 =
  8. 8.1% of 600 =
  9. 9.20% of 530 =
  10. 10.15% of 580 =
  11. 11.1% of 320 =
  12. 12.50% of 640 =
  13. 13.50% of 90 =
  14. 14.5% of 510 =
  15. 15.5% of 200 =
  16. 16.20% of 260 =
  17. 17.15% of 490 =
  18. 18.25% of 140 =
  19. 19.1% of 480 =
  20. 20.5% of 840 =
  21. 21.5% of 550 =
  22. 22.50% of 380 =
  23. 23.1% of 40 =
  24. 24.50% of 590 =
  25. 25.1% of 440 =
  26. 26.5% of 620 =
  27. 27.5% of 400 =
  28. 28.15% of 650 =
  29. 29.1% of 220 =
  30. 30.1% of 640 =
  31. 31.10% of 80 =
  32. 32.5% of 220 =
  33. 33.50% of 770 =
  34. 34.5% of 50 =
  35. 35.10% of 410 =
  36. 36.15% of 140 =
  37. 37.1% of 30 =
  38. 38.1% of 840 =
  39. 39.50% of 730 =
  40. 40.1% of 230 =

Answer key

  1. 83
  2. 71
  3. 50
  4. 8
  5. 69
  6. 29
  7. 4
  8. 6
  9. 106
  10. 87
  11. 3.2
  12. 320
  13. 45
  14. 25.5
  15. 10
  16. 52
  17. 73.5
  18. 35
  19. 4.8
  20. 42
  21. 27.5
  22. 190
  23. 0.4
  24. 295
  25. 4.4
  26. 31
  27. 20
  28. 97.5
  29. 2.2
  30. 6.4
  31. 8
  32. 11
  33. 385
  34. 2.5
  35. 41
  36. 21
  37. 0.3
  38. 8.4
  39. 365
  40. 2.3

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