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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 297 · 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 410 =
  2. 2.1% of 660 =
  3. 3.50% of 800 =
  4. 4.15% of 260 =
  5. 5.20% of 130 =
  6. 6.25% of 630 =
  7. 7.1% of 210 =
  8. 8.25% of 140 =
  9. 9.25% of 640 =
  10. 10.5% of 710 =
  11. 11.20% of 300 =
  12. 12.25% of 810 =
  13. 13.20% of 750 =
  14. 14.5% of 170 =
  15. 15.20% of 260 =
  16. 16.50% of 570 =
  17. 17.10% of 280 =
  18. 18.25% of 90 =
  19. 19.1% of 670 =
  20. 20.5% of 540 =
  21. 21.20% of 590 =
  22. 22.25% of 50 =
  23. 23.10% of 780 =
  24. 24.5% of 570 =
  25. 25.5% of 530 =
  26. 26.20% of 170 =
  27. 27.5% of 270 =
  28. 28.5% of 680 =
  29. 29.15% of 570 =
  30. 30.25% of 240 =
  31. 31.5% of 870 =
  32. 32.15% of 250 =
  33. 33.15% of 690 =
  34. 34.50% of 230 =
  35. 35.20% of 280 =
  36. 36.50% of 440 =
  37. 37.15% of 320 =
  38. 38.1% of 90 =
  39. 39.15% of 580 =
  40. 40.50% of 150 =

Answer key

  1. 82
  2. 6.6
  3. 400
  4. 39
  5. 26
  6. 157.5
  7. 2.1
  8. 35
  9. 160
  10. 35.5
  11. 60
  12. 202.5
  13. 150
  14. 8.5
  15. 52
  16. 285
  17. 28
  18. 22.5
  19. 6.7
  20. 27
  21. 118
  22. 12.5
  23. 78
  24. 28.5
  25. 26.5
  26. 34
  27. 13.5
  28. 34
  29. 85.5
  30. 60
  31. 43.5
  32. 37.5
  33. 103.5
  34. 115
  35. 56
  36. 220
  37. 48
  38. 0.9
  39. 87
  40. 75

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