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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 816 · 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. 1.10% of 840 =
  2. 2.5% of 350 =
  3. 3.10% of 840 =
  4. 4.5% of 440 =
  5. 5.10% of 620 =
  6. 6.10% of 670 =
  7. 7.5% of 190 =
  8. 8.10% of 820 =
  9. 9.5% of 30 =
  10. 10.15% of 800 =
  11. 11.25% of 710 =
  12. 12.25% of 580 =
  13. 13.25% of 170 =
  14. 14.50% of 880 =
  15. 15.1% of 70 =
  16. 16.50% of 550 =
  17. 17.50% of 860 =
  18. 18.5% of 380 =
  19. 19.5% of 530 =
  20. 20.15% of 390 =
  21. 21.50% of 760 =
  22. 22.15% of 70 =
  23. 23.25% of 80 =
  24. 24.5% of 640 =
  25. 25.15% of 110 =
  26. 26.50% of 260 =
  27. 27.5% of 540 =
  28. 28.20% of 100 =
  29. 29.10% of 20 =
  30. 30.15% of 850 =
  31. 31.5% of 20 =
  32. 32.15% of 280 =
  33. 33.20% of 510 =
  34. 34.5% of 30 =
  35. 35.5% of 160 =
  36. 36.5% of 110 =
  37. 37.25% of 550 =
  38. 38.15% of 810 =
  39. 39.20% of 870 =
  40. 40.10% of 540 =

Answer key

  1. 84
  2. 17.5
  3. 84
  4. 22
  5. 62
  6. 67
  7. 9.5
  8. 82
  9. 1.5
  10. 120
  11. 177.5
  12. 145
  13. 42.5
  14. 440
  15. 0.7
  16. 275
  17. 430
  18. 19
  19. 26.5
  20. 58.5
  21. 380
  22. 10.5
  23. 20
  24. 32
  25. 16.5
  26. 130
  27. 27
  28. 20
  29. 2
  30. 127.5
  31. 1
  32. 42
  33. 102
  34. 1.5
  35. 8
  36. 5.5
  37. 137.5
  38. 121.5
  39. 174
  40. 54

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