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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 232 · 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. 1.5% of 450 =
  2. 2.50% of 260 =
  3. 3.20% of 250 =
  4. 4.20% of 180 =
  5. 5.50% of 360 =
  6. 6.5% of 90 =
  7. 7.1% of 850 =
  8. 8.20% of 430 =
  9. 9.50% of 850 =
  10. 10.1% of 160 =
  11. 11.5% of 20 =
  12. 12.20% of 160 =
  13. 13.1% of 810 =
  14. 14.15% of 190 =
  15. 15.10% of 190 =
  16. 16.15% of 890 =
  17. 17.5% of 140 =
  18. 18.1% of 800 =
  19. 19.20% of 460 =
  20. 20.25% of 20 =
  21. 21.1% of 430 =
  22. 22.5% of 170 =
  23. 23.20% of 400 =
  24. 24.25% of 190 =
  25. 25.15% of 550 =
  26. 26.15% of 290 =
  27. 27.50% of 820 =
  28. 28.10% of 130 =
  29. 29.20% of 490 =
  30. 30.25% of 680 =
  31. 31.1% of 300 =
  32. 32.10% of 20 =
  33. 33.50% of 630 =
  34. 34.20% of 110 =
  35. 35.1% of 740 =
  36. 36.10% of 250 =
  37. 37.20% of 110 =
  38. 38.50% of 550 =
  39. 39.20% of 430 =
  40. 40.10% of 500 =

Answer key

  1. 22.5
  2. 130
  3. 50
  4. 36
  5. 180
  6. 4.5
  7. 8.5
  8. 86
  9. 425
  10. 1.6
  11. 1
  12. 32
  13. 8.1
  14. 28.5
  15. 19
  16. 133.5
  17. 7
  18. 8
  19. 92
  20. 5
  21. 4.3
  22. 8.5
  23. 80
  24. 47.5
  25. 82.5
  26. 43.5
  27. 410
  28. 13
  29. 98
  30. 170
  31. 3
  32. 2
  33. 315
  34. 22
  35. 7.4
  36. 25
  37. 22
  38. 275
  39. 86
  40. 50

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