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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 60 · 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. 1.10% of 730 =
  2. 2.50% of 520 =
  3. 3.10% of 20 =
  4. 4.10% of 60 =
  5. 5.50% of 400 =
  6. 6.1% of 320 =
  7. 7.25% of 210 =
  8. 8.15% of 490 =
  9. 9.25% of 20 =
  10. 10.5% of 70 =
  11. 11.10% of 390 =
  12. 12.15% of 760 =
  13. 13.25% of 80 =
  14. 14.20% of 670 =
  15. 15.25% of 850 =
  16. 16.5% of 670 =
  17. 17.5% of 770 =
  18. 18.15% of 240 =
  19. 19.20% of 800 =
  20. 20.50% of 560 =
  21. 21.10% of 230 =
  22. 22.20% of 280 =
  23. 23.10% of 740 =
  24. 24.50% of 320 =
  25. 25.50% of 260 =
  26. 26.50% of 190 =
  27. 27.15% of 180 =
  28. 28.5% of 130 =
  29. 29.20% of 250 =
  30. 30.1% of 890 =
  31. 31.25% of 250 =
  32. 32.20% of 900 =
  33. 33.25% of 620 =
  34. 34.50% of 110 =
  35. 35.20% of 260 =
  36. 36.5% of 610 =
  37. 37.50% of 440 =
  38. 38.1% of 440 =
  39. 39.50% of 60 =
  40. 40.20% of 200 =

Answer key

  1. 73
  2. 260
  3. 2
  4. 6
  5. 200
  6. 3.2
  7. 52.5
  8. 73.5
  9. 5
  10. 3.5
  11. 39
  12. 114
  13. 20
  14. 134
  15. 212.5
  16. 33.5
  17. 38.5
  18. 36
  19. 160
  20. 280
  21. 23
  22. 56
  23. 74
  24. 160
  25. 130
  26. 95
  27. 27
  28. 6.5
  29. 50
  30. 8.9
  31. 62.5
  32. 180
  33. 155
  34. 55
  35. 52
  36. 30.5
  37. 220
  38. 4.4
  39. 30
  40. 40

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