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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 229 · 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 440 =
  2. 2.20% of 490 =
  3. 3.50% of 140 =
  4. 4.50% of 570 =
  5. 5.5% of 740 =
  6. 6.5% of 430 =
  7. 7.25% of 390 =
  8. 8.10% of 570 =
  9. 9.25% of 700 =
  10. 10.5% of 820 =
  11. 11.10% of 770 =
  12. 12.10% of 680 =
  13. 13.5% of 50 =
  14. 14.1% of 790 =
  15. 15.10% of 30 =
  16. 16.20% of 190 =
  17. 17.1% of 100 =
  18. 18.25% of 420 =
  19. 19.10% of 170 =
  20. 20.25% of 630 =
  21. 21.5% of 280 =
  22. 22.5% of 450 =
  23. 23.20% of 120 =
  24. 24.5% of 590 =
  25. 25.1% of 460 =
  26. 26.20% of 350 =
  27. 27.1% of 280 =
  28. 28.50% of 440 =
  29. 29.50% of 800 =
  30. 30.5% of 880 =
  31. 31.15% of 190 =
  32. 32.50% of 110 =
  33. 33.5% of 440 =
  34. 34.25% of 400 =
  35. 35.20% of 610 =
  36. 36.10% of 450 =
  37. 37.25% of 610 =
  38. 38.10% of 100 =
  39. 39.5% of 800 =
  40. 40.20% of 890 =

Answer key

  1. 220
  2. 98
  3. 70
  4. 285
  5. 37
  6. 21.5
  7. 97.5
  8. 57
  9. 175
  10. 41
  11. 77
  12. 68
  13. 2.5
  14. 7.9
  15. 3
  16. 38
  17. 1
  18. 105
  19. 17
  20. 157.5
  21. 14
  22. 22.5
  23. 24
  24. 29.5
  25. 4.6
  26. 70
  27. 2.8
  28. 220
  29. 400
  30. 44
  31. 28.5
  32. 55
  33. 22
  34. 100
  35. 122
  36. 45
  37. 152.5
  38. 10
  39. 40
  40. 178

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