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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 466 · 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 20 =
  2. 2.1% of 190 =
  3. 3.10% of 810 =
  4. 4.10% of 440 =
  5. 5.1% of 460 =
  6. 6.1% of 90 =
  7. 7.1% of 840 =
  8. 8.20% of 80 =
  9. 9.25% of 480 =
  10. 10.15% of 320 =
  11. 11.15% of 500 =
  12. 12.5% of 470 =
  13. 13.20% of 350 =
  14. 14.5% of 430 =
  15. 15.20% of 700 =
  16. 16.20% of 850 =
  17. 17.10% of 240 =
  18. 18.25% of 560 =
  19. 19.25% of 50 =
  20. 20.20% of 750 =
  21. 21.5% of 90 =
  22. 22.10% of 300 =
  23. 23.10% of 670 =
  24. 24.1% of 560 =
  25. 25.25% of 640 =
  26. 26.1% of 680 =
  27. 27.5% of 270 =
  28. 28.15% of 860 =
  29. 29.5% of 240 =
  30. 30.5% of 210 =
  31. 31.10% of 430 =
  32. 32.5% of 730 =
  33. 33.1% of 40 =
  34. 34.10% of 880 =
  35. 35.5% of 50 =
  36. 36.10% of 120 =
  37. 37.20% of 120 =
  38. 38.50% of 730 =
  39. 39.10% of 630 =
  40. 40.25% of 500 =

Answer key

  1. 4
  2. 1.9
  3. 81
  4. 44
  5. 4.6
  6. 0.9
  7. 8.4
  8. 16
  9. 120
  10. 48
  11. 75
  12. 23.5
  13. 70
  14. 21.5
  15. 140
  16. 170
  17. 24
  18. 140
  19. 12.5
  20. 150
  21. 4.5
  22. 30
  23. 67
  24. 5.6
  25. 160
  26. 6.8
  27. 13.5
  28. 129
  29. 12
  30. 10.5
  31. 43
  32. 36.5
  33. 0.4
  34. 88
  35. 2.5
  36. 12
  37. 24
  38. 365
  39. 63
  40. 125

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