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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 267 · 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. 1.15% of 380 =
  2. 2.10% of 380 =
  3. 3.50% of 800 =
  4. 4.50% of 110 =
  5. 5.10% of 550 =
  6. 6.10% of 400 =
  7. 7.50% of 130 =
  8. 8.1% of 860 =
  9. 9.10% of 350 =
  10. 10.5% of 280 =
  11. 11.10% of 220 =
  12. 12.1% of 380 =
  13. 13.10% of 410 =
  14. 14.10% of 40 =
  15. 15.10% of 390 =
  16. 16.5% of 310 =
  17. 17.25% of 630 =
  18. 18.15% of 320 =
  19. 19.5% of 810 =
  20. 20.50% of 200 =
  21. 21.10% of 590 =
  22. 22.1% of 100 =
  23. 23.25% of 40 =
  24. 24.15% of 670 =
  25. 25.10% of 550 =
  26. 26.25% of 100 =
  27. 27.25% of 100 =
  28. 28.5% of 430 =
  29. 29.10% of 90 =
  30. 30.1% of 710 =
  31. 31.5% of 120 =
  32. 32.10% of 200 =
  33. 33.20% of 200 =
  34. 34.50% of 760 =
  35. 35.25% of 660 =
  36. 36.10% of 860 =
  37. 37.10% of 350 =
  38. 38.1% of 550 =
  39. 39.10% of 180 =
  40. 40.10% of 50 =

Answer key

  1. 57
  2. 38
  3. 400
  4. 55
  5. 55
  6. 40
  7. 65
  8. 8.6
  9. 35
  10. 14
  11. 22
  12. 3.8
  13. 41
  14. 4
  15. 39
  16. 15.5
  17. 157.5
  18. 48
  19. 40.5
  20. 100
  21. 59
  22. 1
  23. 10
  24. 100.5
  25. 55
  26. 25
  27. 25
  28. 21.5
  29. 9
  30. 7.1
  31. 6
  32. 20
  33. 40
  34. 380
  35. 165
  36. 86
  37. 35
  38. 5.5
  39. 18
  40. 5

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