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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 797 · 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 70 =
  2. 2.5% of 550 =
  3. 3.10% of 140 =
  4. 4.25% of 670 =
  5. 5.1% of 320 =
  6. 6.5% of 50 =
  7. 7.25% of 80 =
  8. 8.25% of 350 =
  9. 9.10% of 590 =
  10. 10.50% of 60 =
  11. 11.50% of 760 =
  12. 12.50% of 110 =
  13. 13.20% of 340 =
  14. 14.1% of 560 =
  15. 15.25% of 860 =
  16. 16.20% of 580 =
  17. 17.15% of 850 =
  18. 18.15% of 610 =
  19. 19.20% of 110 =
  20. 20.15% of 800 =
  21. 21.15% of 280 =
  22. 22.5% of 540 =
  23. 23.50% of 760 =
  24. 24.5% of 830 =
  25. 25.25% of 700 =
  26. 26.1% of 860 =
  27. 27.20% of 670 =
  28. 28.25% of 840 =
  29. 29.20% of 870 =
  30. 30.20% of 160 =
  31. 31.1% of 30 =
  32. 32.25% of 710 =
  33. 33.10% of 510 =
  34. 34.25% of 160 =
  35. 35.15% of 270 =
  36. 36.20% of 30 =
  37. 37.10% of 450 =
  38. 38.25% of 880 =
  39. 39.15% of 350 =
  40. 40.50% of 850 =

Answer key

  1. 17.5
  2. 27.5
  3. 14
  4. 167.5
  5. 3.2
  6. 2.5
  7. 20
  8. 87.5
  9. 59
  10. 30
  11. 380
  12. 55
  13. 68
  14. 5.6
  15. 215
  16. 116
  17. 127.5
  18. 91.5
  19. 22
  20. 120
  21. 42
  22. 27
  23. 380
  24. 41.5
  25. 175
  26. 8.6
  27. 134
  28. 210
  29. 174
  30. 32
  31. 0.3
  32. 177.5
  33. 51
  34. 40
  35. 40.5
  36. 6
  37. 45
  38. 220
  39. 52.5
  40. 425

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