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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 645 · 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. 1.50% of 870 =
  2. 2.10% of 400 =
  3. 3.15% of 200 =
  4. 4.50% of 70 =
  5. 5.5% of 90 =
  6. 6.1% of 830 =
  7. 7.5% of 40 =
  8. 8.20% of 900 =
  9. 9.15% of 620 =
  10. 10.15% of 310 =
  11. 11.15% of 840 =
  12. 12.1% of 540 =
  13. 13.15% of 800 =
  14. 14.15% of 220 =
  15. 15.15% of 340 =
  16. 16.20% of 870 =
  17. 17.25% of 220 =
  18. 18.10% of 240 =
  19. 19.50% of 250 =
  20. 20.20% of 330 =
  21. 21.10% of 780 =
  22. 22.5% of 820 =
  23. 23.25% of 780 =
  24. 24.1% of 860 =
  25. 25.50% of 360 =
  26. 26.1% of 630 =
  27. 27.1% of 360 =
  28. 28.1% of 240 =
  29. 29.10% of 20 =
  30. 30.10% of 50 =
  31. 31.5% of 300 =
  32. 32.10% of 90 =
  33. 33.50% of 160 =
  34. 34.25% of 480 =
  35. 35.5% of 580 =
  36. 36.10% of 900 =
  37. 37.20% of 440 =
  38. 38.10% of 610 =
  39. 39.5% of 780 =
  40. 40.20% of 70 =

Answer key

  1. 435
  2. 40
  3. 30
  4. 35
  5. 4.5
  6. 8.3
  7. 2
  8. 180
  9. 93
  10. 46.5
  11. 126
  12. 5.4
  13. 120
  14. 33
  15. 51
  16. 174
  17. 55
  18. 24
  19. 125
  20. 66
  21. 78
  22. 41
  23. 195
  24. 8.6
  25. 180
  26. 6.3
  27. 3.6
  28. 2.4
  29. 2
  30. 5
  31. 15
  32. 9
  33. 80
  34. 120
  35. 29
  36. 90
  37. 88
  38. 61
  39. 39
  40. 14

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