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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 721 · 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 160 =
  2. 2.10% of 100 =
  3. 3.25% of 840 =
  4. 4.1% of 220 =
  5. 5.10% of 60 =
  6. 6.15% of 150 =
  7. 7.20% of 570 =
  8. 8.5% of 120 =
  9. 9.10% of 190 =
  10. 10.10% of 610 =
  11. 11.10% of 790 =
  12. 12.1% of 270 =
  13. 13.10% of 80 =
  14. 14.5% of 490 =
  15. 15.5% of 870 =
  16. 16.5% of 490 =
  17. 17.50% of 850 =
  18. 18.15% of 330 =
  19. 19.1% of 860 =
  20. 20.50% of 220 =
  21. 21.5% of 450 =
  22. 22.10% of 160 =
  23. 23.10% of 430 =
  24. 24.25% of 450 =
  25. 25.5% of 670 =
  26. 26.20% of 810 =
  27. 27.5% of 40 =
  28. 28.5% of 80 =
  29. 29.15% of 180 =
  30. 30.50% of 300 =
  31. 31.10% of 200 =
  32. 32.25% of 710 =
  33. 33.10% of 690 =
  34. 34.5% of 730 =
  35. 35.5% of 240 =
  36. 36.25% of 790 =
  37. 37.5% of 130 =
  38. 38.5% of 210 =
  39. 39.15% of 640 =
  40. 40.20% of 690 =

Answer key

  1. 32
  2. 10
  3. 210
  4. 2.2
  5. 6
  6. 22.5
  7. 114
  8. 6
  9. 19
  10. 61
  11. 79
  12. 2.7
  13. 8
  14. 24.5
  15. 43.5
  16. 24.5
  17. 425
  18. 49.5
  19. 8.6
  20. 110
  21. 22.5
  22. 16
  23. 43
  24. 112.5
  25. 33.5
  26. 162
  27. 2
  28. 4
  29. 27
  30. 150
  31. 20
  32. 177.5
  33. 69
  34. 36.5
  35. 12
  36. 197.5
  37. 6.5
  38. 10.5
  39. 96
  40. 138

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