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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 495 · 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 880 =
  2. 2.10% of 40 =
  3. 3.5% of 260 =
  4. 4.10% of 430 =
  5. 5.25% of 310 =
  6. 6.10% of 730 =
  7. 7.5% of 170 =
  8. 8.15% of 50 =
  9. 9.25% of 840 =
  10. 10.1% of 420 =
  11. 11.20% of 540 =
  12. 12.50% of 770 =
  13. 13.25% of 210 =
  14. 14.50% of 280 =
  15. 15.50% of 370 =
  16. 16.25% of 680 =
  17. 17.15% of 660 =
  18. 18.10% of 120 =
  19. 19.1% of 320 =
  20. 20.50% of 770 =
  21. 21.50% of 570 =
  22. 22.10% of 90 =
  23. 23.15% of 770 =
  24. 24.25% of 30 =
  25. 25.20% of 390 =
  26. 26.20% of 60 =
  27. 27.10% of 60 =
  28. 28.20% of 360 =
  29. 29.1% of 710 =
  30. 30.15% of 370 =
  31. 31.5% of 60 =
  32. 32.25% of 390 =
  33. 33.50% of 420 =
  34. 34.50% of 530 =
  35. 35.50% of 590 =
  36. 36.10% of 250 =
  37. 37.10% of 640 =
  38. 38.20% of 240 =
  39. 39.10% of 240 =
  40. 40.25% of 510 =

Answer key

  1. 8.8
  2. 4
  3. 13
  4. 43
  5. 77.5
  6. 73
  7. 8.5
  8. 7.5
  9. 210
  10. 4.2
  11. 108
  12. 385
  13. 52.5
  14. 140
  15. 185
  16. 170
  17. 99
  18. 12
  19. 3.2
  20. 385
  21. 285
  22. 9
  23. 115.5
  24. 7.5
  25. 78
  26. 12
  27. 6
  28. 72
  29. 7.1
  30. 55.5
  31. 3
  32. 97.5
  33. 210
  34. 265
  35. 295
  36. 25
  37. 64
  38. 48
  39. 24
  40. 127.5

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