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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 241 · 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 520 =
  2. 2.5% of 30 =
  3. 3.1% of 170 =
  4. 4.5% of 160 =
  5. 5.1% of 100 =
  6. 6.25% of 160 =
  7. 7.20% of 490 =
  8. 8.1% of 220 =
  9. 9.1% of 360 =
  10. 10.25% of 610 =
  11. 11.5% of 590 =
  12. 12.15% of 860 =
  13. 13.50% of 650 =
  14. 14.50% of 880 =
  15. 15.25% of 150 =
  16. 16.15% of 310 =
  17. 17.20% of 570 =
  18. 18.5% of 110 =
  19. 19.15% of 710 =
  20. 20.20% of 810 =
  21. 21.25% of 350 =
  22. 22.10% of 670 =
  23. 23.25% of 240 =
  24. 24.25% of 260 =
  25. 25.5% of 850 =
  26. 26.50% of 300 =
  27. 27.25% of 570 =
  28. 28.25% of 810 =
  29. 29.10% of 620 =
  30. 30.5% of 70 =
  31. 31.10% of 590 =
  32. 32.20% of 110 =
  33. 33.15% of 30 =
  34. 34.5% of 490 =
  35. 35.25% of 100 =
  36. 36.10% of 540 =
  37. 37.10% of 520 =
  38. 38.20% of 500 =
  39. 39.5% of 720 =
  40. 40.50% of 550 =

Answer key

  1. 130
  2. 1.5
  3. 1.7
  4. 8
  5. 1
  6. 40
  7. 98
  8. 2.2
  9. 3.6
  10. 152.5
  11. 29.5
  12. 129
  13. 325
  14. 440
  15. 37.5
  16. 46.5
  17. 114
  18. 5.5
  19. 106.5
  20. 162
  21. 87.5
  22. 67
  23. 60
  24. 65
  25. 42.5
  26. 150
  27. 142.5
  28. 202.5
  29. 62
  30. 3.5
  31. 59
  32. 22
  33. 4.5
  34. 24.5
  35. 25
  36. 54
  37. 52
  38. 100
  39. 36
  40. 275

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