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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 573 · 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. 1.25% of 430 =
  2. 2.20% of 390 =
  3. 3.10% of 340 =
  4. 4.1% of 300 =
  5. 5.25% of 460 =
  6. 6.50% of 40 =
  7. 7.10% of 560 =
  8. 8.1% of 50 =
  9. 9.15% of 200 =
  10. 10.10% of 470 =
  11. 11.5% of 600 =
  12. 12.25% of 870 =
  13. 13.25% of 580 =
  14. 14.5% of 730 =
  15. 15.20% of 840 =
  16. 16.1% of 660 =
  17. 17.50% of 290 =
  18. 18.5% of 700 =
  19. 19.5% of 690 =
  20. 20.10% of 400 =
  21. 21.50% of 630 =
  22. 22.25% of 270 =
  23. 23.20% of 50 =
  24. 24.5% of 90 =
  25. 25.1% of 50 =
  26. 26.1% of 700 =
  27. 27.25% of 790 =
  28. 28.20% of 190 =
  29. 29.15% of 140 =
  30. 30.20% of 640 =
  31. 31.1% of 140 =
  32. 32.5% of 40 =
  33. 33.1% of 750 =
  34. 34.25% of 590 =
  35. 35.5% of 900 =
  36. 36.50% of 140 =
  37. 37.1% of 680 =
  38. 38.5% of 210 =
  39. 39.10% of 20 =
  40. 40.1% of 60 =

Answer key

  1. 107.5
  2. 78
  3. 34
  4. 3
  5. 115
  6. 20
  7. 56
  8. 0.5
  9. 30
  10. 47
  11. 30
  12. 217.5
  13. 145
  14. 36.5
  15. 168
  16. 6.6
  17. 145
  18. 35
  19. 34.5
  20. 40
  21. 315
  22. 67.5
  23. 10
  24. 4.5
  25. 0.5
  26. 7
  27. 197.5
  28. 38
  29. 21
  30. 128
  31. 1.4
  32. 2
  33. 7.5
  34. 147.5
  35. 45
  36. 70
  37. 6.8
  38. 10.5
  39. 2
  40. 0.6

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