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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 558 · 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 570 =
  2. 2.10% of 850 =
  3. 3.20% of 260 =
  4. 4.5% of 740 =
  5. 5.5% of 110 =
  6. 6.10% of 230 =
  7. 7.15% of 430 =
  8. 8.5% of 180 =
  9. 9.1% of 730 =
  10. 10.50% of 120 =
  11. 11.15% of 400 =
  12. 12.1% of 860 =
  13. 13.10% of 170 =
  14. 14.50% of 250 =
  15. 15.5% of 880 =
  16. 16.5% of 40 =
  17. 17.1% of 370 =
  18. 18.20% of 560 =
  19. 19.50% of 710 =
  20. 20.20% of 300 =
  21. 21.15% of 300 =
  22. 22.1% of 160 =
  23. 23.10% of 290 =
  24. 24.10% of 720 =
  25. 25.15% of 40 =
  26. 26.10% of 380 =
  27. 27.15% of 240 =
  28. 28.10% of 500 =
  29. 29.20% of 390 =
  30. 30.15% of 60 =
  31. 31.25% of 660 =
  32. 32.1% of 80 =
  33. 33.25% of 270 =
  34. 34.1% of 120 =
  35. 35.15% of 760 =
  36. 36.20% of 670 =
  37. 37.1% of 370 =
  38. 38.10% of 440 =
  39. 39.25% of 490 =
  40. 40.1% of 360 =

Answer key

  1. 285
  2. 85
  3. 52
  4. 37
  5. 5.5
  6. 23
  7. 64.5
  8. 9
  9. 7.3
  10. 60
  11. 60
  12. 8.6
  13. 17
  14. 125
  15. 44
  16. 2
  17. 3.7
  18. 112
  19. 355
  20. 60
  21. 45
  22. 1.6
  23. 29
  24. 72
  25. 6
  26. 38
  27. 36
  28. 50
  29. 78
  30. 9
  31. 165
  32. 0.8
  33. 67.5
  34. 1.2
  35. 114
  36. 134
  37. 3.7
  38. 44
  39. 122.5
  40. 3.6

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