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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 481 · 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. 1.15% of 210 =
  2. 2.25% of 380 =
  3. 3.15% of 210 =
  4. 4.20% of 230 =
  5. 5.10% of 210 =
  6. 6.10% of 590 =
  7. 7.50% of 390 =
  8. 8.20% of 80 =
  9. 9.20% of 530 =
  10. 10.20% of 610 =
  11. 11.25% of 90 =
  12. 12.1% of 20 =
  13. 13.5% of 330 =
  14. 14.10% of 520 =
  15. 15.5% of 460 =
  16. 16.50% of 100 =
  17. 17.20% of 110 =
  18. 18.1% of 450 =
  19. 19.1% of 210 =
  20. 20.25% of 130 =
  21. 21.5% of 330 =
  22. 22.1% of 570 =
  23. 23.5% of 570 =
  24. 24.10% of 120 =
  25. 25.15% of 640 =
  26. 26.10% of 520 =
  27. 27.10% of 810 =
  28. 28.5% of 730 =
  29. 29.5% of 820 =
  30. 30.20% of 800 =
  31. 31.1% of 580 =
  32. 32.5% of 400 =
  33. 33.25% of 520 =
  34. 34.25% of 170 =
  35. 35.10% of 860 =
  36. 36.50% of 660 =
  37. 37.5% of 700 =
  38. 38.10% of 430 =
  39. 39.20% of 560 =
  40. 40.5% of 220 =

Answer key

  1. 31.5
  2. 95
  3. 31.5
  4. 46
  5. 21
  6. 59
  7. 195
  8. 16
  9. 106
  10. 122
  11. 22.5
  12. 0.2
  13. 16.5
  14. 52
  15. 23
  16. 50
  17. 22
  18. 4.5
  19. 2.1
  20. 32.5
  21. 16.5
  22. 5.7
  23. 28.5
  24. 12
  25. 96
  26. 52
  27. 81
  28. 36.5
  29. 41
  30. 160
  31. 5.8
  32. 20
  33. 130
  34. 42.5
  35. 86
  36. 330
  37. 35
  38. 43
  39. 112
  40. 11

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