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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 555 · 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. 1.20% of 670 =
  2. 2.10% of 30 =
  3. 3.15% of 50 =
  4. 4.10% of 810 =
  5. 5.1% of 50 =
  6. 6.25% of 270 =
  7. 7.1% of 430 =
  8. 8.10% of 290 =
  9. 9.5% of 160 =
  10. 10.15% of 240 =
  11. 11.50% of 680 =
  12. 12.5% of 700 =
  13. 13.10% of 290 =
  14. 14.50% of 610 =
  15. 15.25% of 580 =
  16. 16.20% of 430 =
  17. 17.20% of 670 =
  18. 18.25% of 30 =
  19. 19.25% of 460 =
  20. 20.1% of 860 =
  21. 21.1% of 730 =
  22. 22.15% of 270 =
  23. 23.25% of 90 =
  24. 24.50% of 80 =
  25. 25.25% of 150 =
  26. 26.50% of 210 =
  27. 27.50% of 800 =
  28. 28.10% of 130 =
  29. 29.1% of 480 =
  30. 30.10% of 190 =
  31. 31.1% of 230 =
  32. 32.1% of 610 =
  33. 33.10% of 470 =
  34. 34.15% of 600 =
  35. 35.15% of 220 =
  36. 36.20% of 280 =
  37. 37.10% of 870 =
  38. 38.25% of 590 =
  39. 39.5% of 860 =
  40. 40.50% of 560 =

Answer key

  1. 134
  2. 3
  3. 7.5
  4. 81
  5. 0.5
  6. 67.5
  7. 4.3
  8. 29
  9. 8
  10. 36
  11. 340
  12. 35
  13. 29
  14. 305
  15. 145
  16. 86
  17. 134
  18. 7.5
  19. 115
  20. 8.6
  21. 7.3
  22. 40.5
  23. 22.5
  24. 40
  25. 37.5
  26. 105
  27. 400
  28. 13
  29. 4.8
  30. 19
  31. 2.3
  32. 6.1
  33. 47
  34. 90
  35. 33
  36. 56
  37. 87
  38. 147.5
  39. 43
  40. 280

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