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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 341 · 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 260 =
  2. 2.50% of 370 =
  3. 3.5% of 510 =
  4. 4.50% of 590 =
  5. 5.20% of 560 =
  6. 6.10% of 270 =
  7. 7.25% of 250 =
  8. 8.20% of 180 =
  9. 9.1% of 570 =
  10. 10.20% of 850 =
  11. 11.5% of 880 =
  12. 12.1% of 490 =
  13. 13.5% of 110 =
  14. 14.25% of 860 =
  15. 15.5% of 120 =
  16. 16.10% of 420 =
  17. 17.5% of 900 =
  18. 18.10% of 340 =
  19. 19.5% of 90 =
  20. 20.20% of 520 =
  21. 21.10% of 80 =
  22. 22.50% of 620 =
  23. 23.25% of 300 =
  24. 24.5% of 810 =
  25. 25.20% of 70 =
  26. 26.50% of 690 =
  27. 27.10% of 140 =
  28. 28.25% of 670 =
  29. 29.20% of 610 =
  30. 30.25% of 730 =
  31. 31.15% of 90 =
  32. 32.15% of 440 =
  33. 33.10% of 690 =
  34. 34.5% of 550 =
  35. 35.5% of 260 =
  36. 36.15% of 230 =
  37. 37.5% of 450 =
  38. 38.1% of 70 =
  39. 39.20% of 490 =
  40. 40.50% of 870 =

Answer key

  1. 26
  2. 185
  3. 25.5
  4. 295
  5. 112
  6. 27
  7. 62.5
  8. 36
  9. 5.7
  10. 170
  11. 44
  12. 4.9
  13. 5.5
  14. 215
  15. 6
  16. 42
  17. 45
  18. 34
  19. 4.5
  20. 104
  21. 8
  22. 310
  23. 75
  24. 40.5
  25. 14
  26. 345
  27. 14
  28. 167.5
  29. 122
  30. 182.5
  31. 13.5
  32. 66
  33. 69
  34. 27.5
  35. 13
  36. 34.5
  37. 22.5
  38. 0.7
  39. 98
  40. 435

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