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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 563 · 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 300 =
  2. 2.10% of 390 =
  3. 3.5% of 120 =
  4. 4.25% of 240 =
  5. 5.10% of 60 =
  6. 6.1% of 800 =
  7. 7.10% of 400 =
  8. 8.15% of 280 =
  9. 9.1% of 830 =
  10. 10.25% of 760 =
  11. 11.20% of 270 =
  12. 12.20% of 710 =
  13. 13.20% of 430 =
  14. 14.25% of 340 =
  15. 15.10% of 140 =
  16. 16.20% of 770 =
  17. 17.20% of 250 =
  18. 18.20% of 400 =
  19. 19.1% of 870 =
  20. 20.10% of 330 =
  21. 21.20% of 590 =
  22. 22.50% of 430 =
  23. 23.50% of 410 =
  24. 24.50% of 450 =
  25. 25.5% of 700 =
  26. 26.20% of 870 =
  27. 27.50% of 900 =
  28. 28.1% of 490 =
  29. 29.15% of 500 =
  30. 30.5% of 230 =
  31. 31.50% of 660 =
  32. 32.50% of 80 =
  33. 33.1% of 110 =
  34. 34.10% of 770 =
  35. 35.15% of 540 =
  36. 36.5% of 830 =
  37. 37.1% of 230 =
  38. 38.10% of 570 =
  39. 39.5% of 120 =
  40. 40.5% of 160 =

Answer key

  1. 60
  2. 39
  3. 6
  4. 60
  5. 6
  6. 8
  7. 40
  8. 42
  9. 8.3
  10. 190
  11. 54
  12. 142
  13. 86
  14. 85
  15. 14
  16. 154
  17. 50
  18. 80
  19. 8.7
  20. 33
  21. 118
  22. 215
  23. 205
  24. 225
  25. 35
  26. 174
  27. 450
  28. 4.9
  29. 75
  30. 11.5
  31. 330
  32. 40
  33. 1.1
  34. 77
  35. 81
  36. 41.5
  37. 2.3
  38. 57
  39. 6
  40. 8

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