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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 321 · 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. 1.50% of 770 =
  2. 2.50% of 480 =
  3. 3.25% of 740 =
  4. 4.5% of 590 =
  5. 5.5% of 570 =
  6. 6.10% of 540 =
  7. 7.20% of 440 =
  8. 8.50% of 850 =
  9. 9.50% of 860 =
  10. 10.50% of 170 =
  11. 11.5% of 540 =
  12. 12.1% of 90 =
  13. 13.1% of 800 =
  14. 14.15% of 650 =
  15. 15.1% of 230 =
  16. 16.1% of 760 =
  17. 17.25% of 860 =
  18. 18.50% of 260 =
  19. 19.20% of 230 =
  20. 20.1% of 310 =
  21. 21.25% of 420 =
  22. 22.25% of 570 =
  23. 23.5% of 880 =
  24. 24.50% of 400 =
  25. 25.5% of 600 =
  26. 26.25% of 120 =
  27. 27.25% of 650 =
  28. 28.15% of 360 =
  29. 29.15% of 380 =
  30. 30.1% of 820 =
  31. 31.5% of 850 =
  32. 32.50% of 470 =
  33. 33.1% of 730 =
  34. 34.20% of 260 =
  35. 35.50% of 290 =
  36. 36.25% of 60 =
  37. 37.50% of 350 =
  38. 38.5% of 270 =
  39. 39.15% of 420 =
  40. 40.15% of 640 =

Answer key

  1. 385
  2. 240
  3. 185
  4. 29.5
  5. 28.5
  6. 54
  7. 88
  8. 425
  9. 430
  10. 85
  11. 27
  12. 0.9
  13. 8
  14. 97.5
  15. 2.3
  16. 7.6
  17. 215
  18. 130
  19. 46
  20. 3.1
  21. 105
  22. 142.5
  23. 44
  24. 200
  25. 30
  26. 30
  27. 162.5
  28. 54
  29. 57
  30. 8.2
  31. 42.5
  32. 235
  33. 7.3
  34. 52
  35. 145
  36. 15
  37. 175
  38. 13.5
  39. 63
  40. 96

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