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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 284 · 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. 1.50% of 240 =
  2. 2.50% of 90 =
  3. 3.20% of 280 =
  4. 4.25% of 620 =
  5. 5.5% of 90 =
  6. 6.15% of 820 =
  7. 7.5% of 720 =
  8. 8.25% of 180 =
  9. 9.5% of 890 =
  10. 10.50% of 70 =
  11. 11.50% of 180 =
  12. 12.10% of 40 =
  13. 13.15% of 290 =
  14. 14.1% of 900 =
  15. 15.25% of 200 =
  16. 16.10% of 390 =
  17. 17.25% of 840 =
  18. 18.10% of 810 =
  19. 19.25% of 270 =
  20. 20.50% of 140 =
  21. 21.1% of 300 =
  22. 22.20% of 70 =
  23. 23.15% of 180 =
  24. 24.15% of 380 =
  25. 25.15% of 560 =
  26. 26.5% of 770 =
  27. 27.10% of 380 =
  28. 28.1% of 250 =
  29. 29.20% of 370 =
  30. 30.1% of 250 =
  31. 31.1% of 550 =
  32. 32.50% of 90 =
  33. 33.15% of 60 =
  34. 34.20% of 860 =
  35. 35.5% of 770 =
  36. 36.1% of 190 =
  37. 37.1% of 60 =
  38. 38.50% of 570 =
  39. 39.20% of 820 =
  40. 40.10% of 210 =

Answer key

  1. 120
  2. 45
  3. 56
  4. 155
  5. 4.5
  6. 123
  7. 36
  8. 45
  9. 44.5
  10. 35
  11. 90
  12. 4
  13. 43.5
  14. 9
  15. 50
  16. 39
  17. 210
  18. 81
  19. 67.5
  20. 70
  21. 3
  22. 14
  23. 27
  24. 57
  25. 84
  26. 38.5
  27. 38
  28. 2.5
  29. 74
  30. 2.5
  31. 5.5
  32. 45
  33. 9
  34. 172
  35. 38.5
  36. 1.9
  37. 0.6
  38. 285
  39. 164
  40. 21

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