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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 459 · 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. 1.25% of 280 =
  2. 2.50% of 270 =
  3. 3.1% of 380 =
  4. 4.5% of 110 =
  5. 5.5% of 540 =
  6. 6.1% of 70 =
  7. 7.10% of 130 =
  8. 8.5% of 150 =
  9. 9.1% of 430 =
  10. 10.1% of 410 =
  11. 11.20% of 810 =
  12. 12.25% of 890 =
  13. 13.25% of 460 =
  14. 14.20% of 260 =
  15. 15.1% of 760 =
  16. 16.25% of 260 =
  17. 17.5% of 50 =
  18. 18.25% of 100 =
  19. 19.10% of 370 =
  20. 20.10% of 260 =
  21. 21.15% of 490 =
  22. 22.15% of 420 =
  23. 23.50% of 230 =
  24. 24.20% of 590 =
  25. 25.20% of 170 =
  26. 26.1% of 750 =
  27. 27.1% of 400 =
  28. 28.50% of 540 =
  29. 29.10% of 670 =
  30. 30.20% of 190 =
  31. 31.50% of 520 =
  32. 32.1% of 40 =
  33. 33.25% of 610 =
  34. 34.50% of 840 =
  35. 35.15% of 260 =
  36. 36.10% of 440 =
  37. 37.5% of 140 =
  38. 38.25% of 640 =
  39. 39.50% of 340 =
  40. 40.25% of 510 =

Answer key

  1. 70
  2. 135
  3. 3.8
  4. 5.5
  5. 27
  6. 0.7
  7. 13
  8. 7.5
  9. 4.3
  10. 4.1
  11. 162
  12. 222.5
  13. 115
  14. 52
  15. 7.6
  16. 65
  17. 2.5
  18. 25
  19. 37
  20. 26
  21. 73.5
  22. 63
  23. 115
  24. 118
  25. 34
  26. 7.5
  27. 4
  28. 270
  29. 67
  30. 38
  31. 260
  32. 0.4
  33. 152.5
  34. 420
  35. 39
  36. 44
  37. 7
  38. 160
  39. 170
  40. 127.5

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