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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 499 · 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 300 =
  2. 2.10% of 220 =
  3. 3.5% of 380 =
  4. 4.1% of 270 =
  5. 5.25% of 440 =
  6. 6.15% of 800 =
  7. 7.25% of 640 =
  8. 8.15% of 170 =
  9. 9.20% of 860 =
  10. 10.10% of 490 =
  11. 11.5% of 540 =
  12. 12.10% of 860 =
  13. 13.10% of 100 =
  14. 14.5% of 90 =
  15. 15.15% of 230 =
  16. 16.10% of 900 =
  17. 17.20% of 740 =
  18. 18.20% of 410 =
  19. 19.25% of 780 =
  20. 20.10% of 780 =
  21. 21.50% of 710 =
  22. 22.25% of 430 =
  23. 23.20% of 320 =
  24. 24.1% of 860 =
  25. 25.20% of 300 =
  26. 26.15% of 550 =
  27. 27.15% of 770 =
  28. 28.15% of 460 =
  29. 29.10% of 850 =
  30. 30.10% of 150 =
  31. 31.10% of 110 =
  32. 32.1% of 290 =
  33. 33.50% of 840 =
  34. 34.50% of 290 =
  35. 35.10% of 350 =
  36. 36.1% of 250 =
  37. 37.15% of 900 =
  38. 38.25% of 710 =
  39. 39.25% of 550 =
  40. 40.25% of 260 =

Answer key

  1. 60
  2. 22
  3. 19
  4. 2.7
  5. 110
  6. 120
  7. 160
  8. 25.5
  9. 172
  10. 49
  11. 27
  12. 86
  13. 10
  14. 4.5
  15. 34.5
  16. 90
  17. 148
  18. 82
  19. 195
  20. 78
  21. 355
  22. 107.5
  23. 64
  24. 8.6
  25. 60
  26. 82.5
  27. 115.5
  28. 69
  29. 85
  30. 15
  31. 11
  32. 2.9
  33. 420
  34. 145
  35. 35
  36. 2.5
  37. 135
  38. 177.5
  39. 137.5
  40. 65

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