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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 188 · 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 690 =
  2. 2.15% of 800 =
  3. 3.50% of 490 =
  4. 4.1% of 220 =
  5. 5.15% of 380 =
  6. 6.15% of 360 =
  7. 7.10% of 670 =
  8. 8.25% of 260 =
  9. 9.5% of 660 =
  10. 10.15% of 390 =
  11. 11.15% of 420 =
  12. 12.5% of 390 =
  13. 13.50% of 640 =
  14. 14.15% of 170 =
  15. 15.50% of 280 =
  16. 16.1% of 370 =
  17. 17.5% of 880 =
  18. 18.15% of 70 =
  19. 19.15% of 280 =
  20. 20.25% of 870 =
  21. 21.10% of 460 =
  22. 22.15% of 810 =
  23. 23.25% of 710 =
  24. 24.5% of 640 =
  25. 25.50% of 140 =
  26. 26.50% of 290 =
  27. 27.50% of 670 =
  28. 28.15% of 880 =
  29. 29.1% of 300 =
  30. 30.25% of 260 =
  31. 31.1% of 610 =
  32. 32.20% of 780 =
  33. 33.5% of 190 =
  34. 34.25% of 770 =
  35. 35.20% of 240 =
  36. 36.50% of 50 =
  37. 37.25% of 70 =
  38. 38.50% of 140 =
  39. 39.5% of 190 =
  40. 40.50% of 40 =

Answer key

  1. 6.9
  2. 120
  3. 245
  4. 2.2
  5. 57
  6. 54
  7. 67
  8. 65
  9. 33
  10. 58.5
  11. 63
  12. 19.5
  13. 320
  14. 25.5
  15. 140
  16. 3.7
  17. 44
  18. 10.5
  19. 42
  20. 217.5
  21. 46
  22. 121.5
  23. 177.5
  24. 32
  25. 70
  26. 145
  27. 335
  28. 132
  29. 3
  30. 65
  31. 6.1
  32. 156
  33. 9.5
  34. 192.5
  35. 48
  36. 25
  37. 17.5
  38. 70
  39. 9.5
  40. 20

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