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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 396 · 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 180 =
  2. 2.20% of 500 =
  3. 3.20% of 20 =
  4. 4.20% of 590 =
  5. 5.20% of 90 =
  6. 6.15% of 200 =
  7. 7.15% of 220 =
  8. 8.5% of 240 =
  9. 9.10% of 60 =
  10. 10.25% of 620 =
  11. 11.10% of 40 =
  12. 12.50% of 190 =
  13. 13.1% of 90 =
  14. 14.5% of 240 =
  15. 15.50% of 880 =
  16. 16.50% of 100 =
  17. 17.1% of 260 =
  18. 18.10% of 890 =
  19. 19.1% of 290 =
  20. 20.20% of 360 =
  21. 21.25% of 500 =
  22. 22.50% of 260 =
  23. 23.25% of 260 =
  24. 24.25% of 870 =
  25. 25.25% of 700 =
  26. 26.5% of 720 =
  27. 27.50% of 620 =
  28. 28.5% of 690 =
  29. 29.1% of 750 =
  30. 30.15% of 110 =
  31. 31.5% of 680 =
  32. 32.10% of 240 =
  33. 33.50% of 710 =
  34. 34.1% of 730 =
  35. 35.1% of 230 =
  36. 36.15% of 800 =
  37. 37.1% of 810 =
  38. 38.20% of 360 =
  39. 39.10% of 830 =
  40. 40.25% of 730 =

Answer key

  1. 18
  2. 100
  3. 4
  4. 118
  5. 18
  6. 30
  7. 33
  8. 12
  9. 6
  10. 155
  11. 4
  12. 95
  13. 0.9
  14. 12
  15. 440
  16. 50
  17. 2.6
  18. 89
  19. 2.9
  20. 72
  21. 125
  22. 130
  23. 65
  24. 217.5
  25. 175
  26. 36
  27. 310
  28. 34.5
  29. 7.5
  30. 16.5
  31. 34
  32. 24
  33. 355
  34. 7.3
  35. 2.3
  36. 120
  37. 8.1
  38. 72
  39. 83
  40. 182.5

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