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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 7 · 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. 1.1% of 600 =
  2. 2.50% of 630 =
  3. 3.5% of 830 =
  4. 4.25% of 410 =
  5. 5.5% of 190 =
  6. 6.50% of 200 =
  7. 7.25% of 680 =
  8. 8.10% of 250 =
  9. 9.10% of 830 =
  10. 10.1% of 600 =
  11. 11.10% of 90 =
  12. 12.15% of 270 =
  13. 13.25% of 410 =
  14. 14.5% of 130 =
  15. 15.50% of 490 =
  16. 16.50% of 460 =
  17. 17.1% of 470 =
  18. 18.15% of 80 =
  19. 19.10% of 150 =
  20. 20.25% of 550 =
  21. 21.5% of 410 =
  22. 22.10% of 800 =
  23. 23.10% of 560 =
  24. 24.15% of 80 =
  25. 25.10% of 520 =
  26. 26.1% of 410 =
  27. 27.15% of 270 =
  28. 28.25% of 190 =
  29. 29.1% of 880 =
  30. 30.1% of 490 =
  31. 31.10% of 450 =
  32. 32.20% of 230 =
  33. 33.25% of 530 =
  34. 34.50% of 80 =
  35. 35.20% of 750 =
  36. 36.15% of 430 =
  37. 37.10% of 100 =
  38. 38.10% of 250 =
  39. 39.20% of 790 =
  40. 40.10% of 670 =

Answer key

  1. 6
  2. 315
  3. 41.5
  4. 102.5
  5. 9.5
  6. 100
  7. 170
  8. 25
  9. 83
  10. 6
  11. 9
  12. 40.5
  13. 102.5
  14. 6.5
  15. 245
  16. 230
  17. 4.7
  18. 12
  19. 15
  20. 137.5
  21. 20.5
  22. 80
  23. 56
  24. 12
  25. 52
  26. 4.1
  27. 40.5
  28. 47.5
  29. 8.8
  30. 4.9
  31. 45
  32. 46
  33. 132.5
  34. 40
  35. 150
  36. 64.5
  37. 10
  38. 25
  39. 158
  40. 67

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