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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 55 · 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 690 =
  2. 2.1% of 490 =
  3. 3.5% of 630 =
  4. 4.15% of 450 =
  5. 5.25% of 710 =
  6. 6.25% of 400 =
  7. 7.5% of 780 =
  8. 8.50% of 190 =
  9. 9.25% of 270 =
  10. 10.5% of 110 =
  11. 11.50% of 20 =
  12. 12.5% of 550 =
  13. 13.1% of 40 =
  14. 14.15% of 220 =
  15. 15.20% of 530 =
  16. 16.5% of 700 =
  17. 17.1% of 680 =
  18. 18.25% of 170 =
  19. 19.10% of 900 =
  20. 20.25% of 240 =
  21. 21.10% of 470 =
  22. 22.15% of 180 =
  23. 23.1% of 280 =
  24. 24.1% of 530 =
  25. 25.20% of 250 =
  26. 26.1% of 670 =
  27. 27.50% of 80 =
  28. 28.20% of 230 =
  29. 29.50% of 530 =
  30. 30.1% of 800 =
  31. 31.20% of 480 =
  32. 32.20% of 210 =
  33. 33.50% of 880 =
  34. 34.25% of 900 =
  35. 35.25% of 570 =
  36. 36.50% of 750 =
  37. 37.50% of 730 =
  38. 38.5% of 820 =
  39. 39.1% of 900 =
  40. 40.1% of 20 =

Answer key

  1. 69
  2. 4.9
  3. 31.5
  4. 67.5
  5. 177.5
  6. 100
  7. 39
  8. 95
  9. 67.5
  10. 5.5
  11. 10
  12. 27.5
  13. 0.4
  14. 33
  15. 106
  16. 35
  17. 6.8
  18. 42.5
  19. 90
  20. 60
  21. 47
  22. 27
  23. 2.8
  24. 5.3
  25. 50
  26. 6.7
  27. 40
  28. 46
  29. 265
  30. 8
  31. 96
  32. 42
  33. 440
  34. 225
  35. 142.5
  36. 375
  37. 365
  38. 41
  39. 9
  40. 0.2

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