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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 780 · 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 270 =
  2. 2.25% of 360 =
  3. 3.10% of 170 =
  4. 4.15% of 360 =
  5. 5.20% of 460 =
  6. 6.20% of 310 =
  7. 7.20% of 900 =
  8. 8.1% of 250 =
  9. 9.25% of 290 =
  10. 10.20% of 160 =
  11. 11.15% of 460 =
  12. 12.20% of 890 =
  13. 13.20% of 730 =
  14. 14.1% of 190 =
  15. 15.5% of 680 =
  16. 16.15% of 130 =
  17. 17.25% of 820 =
  18. 18.15% of 540 =
  19. 19.20% of 810 =
  20. 20.25% of 140 =
  21. 21.10% of 570 =
  22. 22.5% of 20 =
  23. 23.25% of 830 =
  24. 24.1% of 340 =
  25. 25.1% of 770 =
  26. 26.50% of 520 =
  27. 27.15% of 30 =
  28. 28.15% of 570 =
  29. 29.5% of 170 =
  30. 30.5% of 370 =
  31. 31.15% of 610 =
  32. 32.20% of 30 =
  33. 33.15% of 140 =
  34. 34.10% of 610 =
  35. 35.5% of 130 =
  36. 36.15% of 490 =
  37. 37.10% of 570 =
  38. 38.15% of 400 =
  39. 39.50% of 860 =
  40. 40.25% of 160 =

Answer key

  1. 135
  2. 90
  3. 17
  4. 54
  5. 92
  6. 62
  7. 180
  8. 2.5
  9. 72.5
  10. 32
  11. 69
  12. 178
  13. 146
  14. 1.9
  15. 34
  16. 19.5
  17. 205
  18. 81
  19. 162
  20. 35
  21. 57
  22. 1
  23. 207.5
  24. 3.4
  25. 7.7
  26. 260
  27. 4.5
  28. 85.5
  29. 8.5
  30. 18.5
  31. 91.5
  32. 6
  33. 21
  34. 61
  35. 6.5
  36. 73.5
  37. 57
  38. 60
  39. 430
  40. 40

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