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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 451 · 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 650 =
  2. 2.10% of 260 =
  3. 3.50% of 900 =
  4. 4.25% of 20 =
  5. 5.20% of 510 =
  6. 6.50% of 40 =
  7. 7.10% of 880 =
  8. 8.10% of 400 =
  9. 9.50% of 180 =
  10. 10.1% of 90 =
  11. 11.25% of 700 =
  12. 12.50% of 130 =
  13. 13.5% of 860 =
  14. 14.25% of 790 =
  15. 15.10% of 120 =
  16. 16.5% of 730 =
  17. 17.50% of 380 =
  18. 18.20% of 540 =
  19. 19.15% of 250 =
  20. 20.1% of 70 =
  21. 21.5% of 680 =
  22. 22.25% of 620 =
  23. 23.5% of 900 =
  24. 24.10% of 230 =
  25. 25.25% of 610 =
  26. 26.20% of 320 =
  27. 27.5% of 280 =
  28. 28.15% of 330 =
  29. 29.10% of 30 =
  30. 30.25% of 430 =
  31. 31.5% of 350 =
  32. 32.20% of 710 =
  33. 33.20% of 490 =
  34. 34.10% of 620 =
  35. 35.1% of 560 =
  36. 36.10% of 460 =
  37. 37.5% of 670 =
  38. 38.5% of 230 =
  39. 39.20% of 230 =
  40. 40.50% of 460 =

Answer key

  1. 130
  2. 26
  3. 450
  4. 5
  5. 102
  6. 20
  7. 88
  8. 40
  9. 90
  10. 0.9
  11. 175
  12. 65
  13. 43
  14. 197.5
  15. 12
  16. 36.5
  17. 190
  18. 108
  19. 37.5
  20. 0.7
  21. 34
  22. 155
  23. 45
  24. 23
  25. 152.5
  26. 64
  27. 14
  28. 49.5
  29. 3
  30. 107.5
  31. 17.5
  32. 142
  33. 98
  34. 62
  35. 5.6
  36. 46
  37. 33.5
  38. 11.5
  39. 46
  40. 230

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