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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 687 · 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. 2.1% of 680 =
  3. 3.20% of 680 =
  4. 4.1% of 100 =
  5. 5.50% of 900 =
  6. 6.50% of 430 =
  7. 7.50% of 650 =
  8. 8.50% of 640 =
  9. 9.5% of 650 =
  10. 10.1% of 100 =
  11. 11.15% of 620 =
  12. 12.20% of 830 =
  13. 13.1% of 290 =
  14. 14.25% of 60 =
  15. 15.20% of 690 =
  16. 16.15% of 730 =
  17. 17.25% of 310 =
  18. 18.25% of 20 =
  19. 19.15% of 500 =
  20. 20.10% of 830 =
  21. 21.25% of 530 =
  22. 22.25% of 240 =
  23. 23.15% of 150 =
  24. 24.50% of 170 =
  25. 25.15% of 800 =
  26. 26.5% of 310 =
  27. 27.20% of 100 =
  28. 28.20% of 220 =
  29. 29.50% of 250 =
  30. 30.5% of 640 =
  31. 31.5% of 40 =
  32. 32.5% of 380 =
  33. 33.10% of 110 =
  34. 34.1% of 820 =
  35. 35.10% of 580 =
  36. 36.50% of 340 =
  37. 37.10% of 40 =
  38. 38.5% of 710 =
  39. 39.5% of 300 =
  40. 40.50% of 510 =

Answer key

  1. 84
  2. 6.8
  3. 136
  4. 1
  5. 450
  6. 215
  7. 325
  8. 320
  9. 32.5
  10. 1
  11. 93
  12. 166
  13. 2.9
  14. 15
  15. 138
  16. 109.5
  17. 77.5
  18. 5
  19. 75
  20. 83
  21. 132.5
  22. 60
  23. 22.5
  24. 85
  25. 120
  26. 15.5
  27. 20
  28. 44
  29. 125
  30. 32
  31. 2
  32. 19
  33. 11
  34. 8.2
  35. 58
  36. 170
  37. 4
  38. 35.5
  39. 15
  40. 255

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