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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 151 · 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 870 =
  2. 2.5% of 850 =
  3. 3.5% of 700 =
  4. 4.15% of 800 =
  5. 5.10% of 690 =
  6. 6.15% of 190 =
  7. 7.50% of 200 =
  8. 8.50% of 620 =
  9. 9.50% of 890 =
  10. 10.5% of 860 =
  11. 11.20% of 150 =
  12. 12.15% of 140 =
  13. 13.20% of 860 =
  14. 14.5% of 550 =
  15. 15.1% of 540 =
  16. 16.15% of 400 =
  17. 17.25% of 80 =
  18. 18.10% of 810 =
  19. 19.20% of 640 =
  20. 20.20% of 690 =
  21. 21.5% of 590 =
  22. 22.25% of 550 =
  23. 23.5% of 220 =
  24. 24.1% of 430 =
  25. 25.25% of 80 =
  26. 26.10% of 20 =
  27. 27.10% of 490 =
  28. 28.15% of 640 =
  29. 29.15% of 480 =
  30. 30.50% of 60 =
  31. 31.1% of 180 =
  32. 32.5% of 150 =
  33. 33.20% of 430 =
  34. 34.25% of 160 =
  35. 35.5% of 230 =
  36. 36.5% of 770 =
  37. 37.1% of 250 =
  38. 38.5% of 680 =
  39. 39.5% of 720 =
  40. 40.10% of 160 =

Answer key

  1. 8.7
  2. 42.5
  3. 35
  4. 120
  5. 69
  6. 28.5
  7. 100
  8. 310
  9. 445
  10. 43
  11. 30
  12. 21
  13. 172
  14. 27.5
  15. 5.4
  16. 60
  17. 20
  18. 81
  19. 128
  20. 138
  21. 29.5
  22. 137.5
  23. 11
  24. 4.3
  25. 20
  26. 2
  27. 49
  28. 96
  29. 72
  30. 30
  31. 1.8
  32. 7.5
  33. 86
  34. 40
  35. 11.5
  36. 38.5
  37. 2.5
  38. 34
  39. 36
  40. 16

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