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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 502 · 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. 1.1% of 830 =
  2. 2.25% of 570 =
  3. 3.15% of 570 =
  4. 4.50% of 840 =
  5. 5.15% of 140 =
  6. 6.10% of 360 =
  7. 7.5% of 650 =
  8. 8.50% of 850 =
  9. 9.10% of 570 =
  10. 10.25% of 40 =
  11. 11.25% of 830 =
  12. 12.20% of 880 =
  13. 13.15% of 760 =
  14. 14.5% of 870 =
  15. 15.20% of 790 =
  16. 16.5% of 100 =
  17. 17.50% of 820 =
  18. 18.5% of 280 =
  19. 19.25% of 140 =
  20. 20.20% of 370 =
  21. 21.10% of 230 =
  22. 22.5% of 760 =
  23. 23.20% of 530 =
  24. 24.50% of 740 =
  25. 25.25% of 120 =
  26. 26.20% of 310 =
  27. 27.1% of 460 =
  28. 28.10% of 870 =
  29. 29.5% of 30 =
  30. 30.15% of 370 =
  31. 31.25% of 610 =
  32. 32.15% of 810 =
  33. 33.50% of 260 =
  34. 34.10% of 240 =
  35. 35.15% of 300 =
  36. 36.5% of 880 =
  37. 37.20% of 190 =
  38. 38.10% of 250 =
  39. 39.25% of 270 =
  40. 40.20% of 60 =

Answer key

  1. 8.3
  2. 142.5
  3. 85.5
  4. 420
  5. 21
  6. 36
  7. 32.5
  8. 425
  9. 57
  10. 10
  11. 207.5
  12. 176
  13. 114
  14. 43.5
  15. 158
  16. 5
  17. 410
  18. 14
  19. 35
  20. 74
  21. 23
  22. 38
  23. 106
  24. 370
  25. 30
  26. 62
  27. 4.6
  28. 87
  29. 1.5
  30. 55.5
  31. 152.5
  32. 121.5
  33. 130
  34. 24
  35. 45
  36. 44
  37. 38
  38. 25
  39. 67.5
  40. 12

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