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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 787 · 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 20 =
  2. 2.5% of 560 =
  3. 3.1% of 380 =
  4. 4.20% of 470 =
  5. 5.5% of 240 =
  6. 6.10% of 300 =
  7. 7.15% of 600 =
  8. 8.25% of 230 =
  9. 9.1% of 600 =
  10. 10.15% of 260 =
  11. 11.15% of 800 =
  12. 12.5% of 140 =
  13. 13.15% of 290 =
  14. 14.50% of 350 =
  15. 15.5% of 150 =
  16. 16.50% of 850 =
  17. 17.50% of 440 =
  18. 18.20% of 320 =
  19. 19.25% of 330 =
  20. 20.10% of 760 =
  21. 21.50% of 830 =
  22. 22.15% of 50 =
  23. 23.5% of 650 =
  24. 24.20% of 670 =
  25. 25.15% of 130 =
  26. 26.10% of 40 =
  27. 27.20% of 850 =
  28. 28.25% of 540 =
  29. 29.5% of 420 =
  30. 30.10% of 650 =
  31. 31.25% of 770 =
  32. 32.10% of 190 =
  33. 33.25% of 160 =
  34. 34.15% of 90 =
  35. 35.25% of 820 =
  36. 36.5% of 400 =
  37. 37.1% of 380 =
  38. 38.50% of 160 =
  39. 39.1% of 300 =
  40. 40.5% of 770 =

Answer key

  1. 0.2
  2. 28
  3. 3.8
  4. 94
  5. 12
  6. 30
  7. 90
  8. 57.5
  9. 6
  10. 39
  11. 120
  12. 7
  13. 43.5
  14. 175
  15. 7.5
  16. 425
  17. 220
  18. 64
  19. 82.5
  20. 76
  21. 415
  22. 7.5
  23. 32.5
  24. 134
  25. 19.5
  26. 4
  27. 170
  28. 135
  29. 21
  30. 65
  31. 192.5
  32. 19
  33. 40
  34. 13.5
  35. 205
  36. 20
  37. 3.8
  38. 80
  39. 3
  40. 38.5

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