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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 786 · 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 350 =
  2. 2.10% of 90 =
  3. 3.1% of 500 =
  4. 4.20% of 770 =
  5. 5.25% of 370 =
  6. 6.50% of 390 =
  7. 7.10% of 260 =
  8. 8.50% of 150 =
  9. 9.20% of 520 =
  10. 10.10% of 420 =
  11. 11.5% of 840 =
  12. 12.5% of 660 =
  13. 13.20% of 520 =
  14. 14.20% of 850 =
  15. 15.5% of 40 =
  16. 16.1% of 840 =
  17. 17.15% of 430 =
  18. 18.10% of 50 =
  19. 19.5% of 750 =
  20. 20.10% of 140 =
  21. 21.5% of 240 =
  22. 22.5% of 670 =
  23. 23.50% of 200 =
  24. 24.5% of 50 =
  25. 25.50% of 670 =
  26. 26.10% of 860 =
  27. 27.50% of 730 =
  28. 28.25% of 610 =
  29. 29.25% of 880 =
  30. 30.15% of 460 =
  31. 31.5% of 200 =
  32. 32.20% of 130 =
  33. 33.25% of 660 =
  34. 34.10% of 890 =
  35. 35.15% of 60 =
  36. 36.25% of 190 =
  37. 37.15% of 290 =
  38. 38.5% of 400 =
  39. 39.20% of 810 =
  40. 40.50% of 80 =

Answer key

  1. 87.5
  2. 9
  3. 5
  4. 154
  5. 92.5
  6. 195
  7. 26
  8. 75
  9. 104
  10. 42
  11. 42
  12. 33
  13. 104
  14. 170
  15. 2
  16. 8.4
  17. 64.5
  18. 5
  19. 37.5
  20. 14
  21. 12
  22. 33.5
  23. 100
  24. 2.5
  25. 335
  26. 86
  27. 365
  28. 152.5
  29. 220
  30. 69
  31. 10
  32. 26
  33. 165
  34. 89
  35. 9
  36. 47.5
  37. 43.5
  38. 20
  39. 162
  40. 40

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